Is it common sense? The eyebrow ring is certianly more attention getting. That is why I used it, to emphasize the point. Consider how you feel about a fellow pilot wearing an eyebrow ring, is the how the anti backpackers feel about you wearing a backpack.

Especially when worn over both shoulders. Is that how you wear it CaptnVegetto? With both shoulder straps over your shoulderboards? Or just casually over one shoulder? Kinda laid back, laisser faire?
Depends on where I am. Besides, I now don't wear shoulder boards.
Therefore, if you want it to be ok to wear a backpack then it is also ok to wear a eyebrow stud. Where does one draw the line? Who gets to decide what is ok and what is not. Obviously you want to decide that backpacks are ok. Your FOM doesn't say you CAN use backpacks. It doesn't say you CAN"T wear eyebrow studs.
Actually, it did. There was a paragraph in it on visible piercings. Nothing on backpacks. Males were not supposed to have any visible piercings of any kind. Not even ears. Of course, that did not stop one captain that I knew of. He had an earring, and a mullet for that matter. Now THAT guy was a poster boy for unprofessionalism. He was in the top 5% of the seniority list too, although he was NOT very highly thought of.
1. We all want the most for the cheapest price. Pax want the cheapest price but they's rather have a jet than a prop airplane. I think they'd rather have a conservative professional image than not. And does your neighbors (lack of) concern determine whether you care? IOW, as a professional pilot, since my neighbor doesn't care and my passengers don't care...guess what... I don't care!
Not about backpacks, no. More to come
2. Your FOM doesn't say much about tongue studs and eyebrow rings. Do you need it to? Are you getting the point? Do you wear a tie cause your FOM says so, or because it is a uniform standard?
See my above post about the jewelry. I wear a tie b/c my FOM says so. I've already said if I could wear a golf shirt and khakis, I would.
3. And at my airline they don't say much either. That doesn't mean it is ok. I saw a pilot with a goatee the other day. WTFO? Beards and goatee on pilots work in Europe. But we are not in Europe. No one has said much to you at work, (do you need them too?) but yet you are getting a loud and clear message right here right now.
I will never have a beard and goatee because I believe it is a safety concern. Supposedly you are not able to get a perfect seal on your O2 mask if you have one. I'll never grow one anyway because I can't stand the itching. A 'loud and clear message'? Sure from you and about 4 or 5 other people on here, but what about all the others arguing against you? It's pretty even. Not enough to sway me. I still haven't seen a reason to convince me in all our debating.
This backpack issue is a fine line and I'd rather debate this, to get to promote individual understanding of the uniform, than whether or not it is professional as pilots to wear tongue studs.
Met several flight attendants with tounge studs. I believe it was against their FOM, though I'm not sure. I asked, they said no, as long as it wasn't visible.
Just keep in mind that when one wears a pilot uniform there is a level of responsibility in that one pilot can speak for thousands. All we have is our image. Your "don't judge a book by its cover" arguement doesn't work because all our passengers and customers have is our image and behavior. They don't watch us fly and don't have access to our flying records. Sarcasm on: One passenger to the other. "Did you see our pilot? He looks like a beach bum in shorts and sandals when he sat down in the cockpit." Other passengers replies "yes, but looking at his 10 year training history he has never failed a checkride!" Sarcasm off.
When I functioned as a Captain, I realized my effectiveness with my crew and passengers was greatly impacted by my appearance and behavior. And when I had a FO that had attention getting variations in his appearance and behavior, I didn't say anything but I also didn't give him as much credit in his abilities as a pilot. And as a Captain, I don't have to. I am not going to wait until a V1 cut to see if this guy can cut it.... IOW, if he can't wear the uniform right and stop swearing for five minutes how do I know he holds himself to a high standard when it comes to flying? I don't, I have to wait two ro three legs and that is not fair to me or him. When I was an FO, I knew alot about the Captain I was with by his image and behavior.....and how effective I was going to be for him/her.
Looks like we are going round and 'round and coming to a agree-to-disagree.
Different schools of thought.......old school-new school?
Guess you're right. I see what you are referring to as far as weirdo piercings, but I just see that and a backpack as two completely different things. A backpack, to me, is just not a big deal. A nose ring is. It's like what I was saying earlier. Is a hydrogen bomb the same as a stick of dynamite? Well, they're both bombs, but one is waaaay different than the other.
Besides someone will tell us to get a room soon. I'll bet FN FAL will be there