I agree that Tips are earned, not required. Even if you do get reimbursed for tipping by your company, it does not mean you have to give $20 every time you pull onto the ramp - it's that mentality that has made so many line guys just expect the cash. Just because I get reimbursed does NOT mean you are entitled to it.
Rampers/line guys have a job to do with specific duties, just like we pilots have. And absolutely, if the line guys go above and beyond, a little cash is definitely deserved. But, if the guy brings me ice and papers and calls the fuel truck over, then he's done his job and that's what he gets paid to do.
I'm sorry if that sounds harsh, but do your job, get paid your salary/hourly. Go above and beyond, get tipped. Like someone else had posted, I hate the feeling of being guilted into tipping, or worse, the guy who hangs around by your side until reach into your pocket.
I hold the FBOs slightly responsible for this behavior as well. There needs to be clearly defined job descriptions for the line guys and a well written code of conduct that needs to be strictly enforced. Even when requesting a quick turn, especially at a place that advertises as the best quick turn FBO, I'm under the impression that that is their job, that's the service we are paying for in ramp/handling/service fees.
Something else I've noticed recently is line guys walking up the stairs of the plane while the PAX are still trying to get off. Dude, I know you are there, I know there are other planes coming or going, but chill out - when my PAX get off, I will address the needs of the airplane with you, but stay out of the way of my PAX.
My other pet peeve is when you pull into an FBO with a high profile PAX and somehow the FBO learns before hand who is on board (usually the limo driver let's them know) and there are 40 line guys out there to help you. Atlantic Las Vegas is a great example of this. Half of the time they have no idea where they tugged you the night before, there's no one available to get you ice or fuel, but a high pro PAX shows up and they are all lined up waiting to get a glimpse and possibly a tips.
Sorry for the ranting, just had to get it off my chest - thanks!
Dru