I'm sorry that you don't realize that.
Realize it? Unfortunately, you're foolish enough to believe it.
When you one day grow up and find something else to do aside from being the uniform police for operators for whom you don't work (and with which you have no connection), and one day when you bother to substantiate your facts (of which you as yet have none), you may not post so foolishly.
Do you carry a ruler to ensure that each pilot at the terminal or FBO wears their wings the requisite distance above their pocket, that their gig line is straight, and that the shade of blue in their unpleated uniform pants matches the company specification? Do you do that, or are you simply selective regarding who's business it is into which you decide to inject yourself.
You've failed to answer the question, so it bears asking again; how do you know this individual was a pilot? A flight instructor? Off-duty? For whom did this alleged instructor work? You haven't replied thus far because you really don't know.
You're too busy sticking your nose where it doesn't belong, in this case the motorcycle seat of the alleged instructor, that you really don't need facts. After all, isn't it so much more professional for you to go off half-cocked pass judgement outside your area of concern, and mind someone else's business?
Do this: find out who it is for whom this person you saw works. Report them. Protect us all from this terrible slight on our collective reputation. After all, you think you're the man for the job; you're the one willing to butt in where you don't belong. You might as well push it as far as you can go. Why stop at passing judgment regarding things that don't concern you, when you can really inject yourself well beyond your bounds? Go for it. You know you want to, don't you?
The problem is that you really have no idea where to begin, as you don't know who it is for whom this person worked, what they do, or any other tidbit remotely related to the facts. You saw someone on a motorcycle, rushed to judgment, and had to rush here to the internet to tell us all.
Does your head come with it's own satellite system, or perhaps just some small moons? It's certainly getting big enough. You're already judge and jury. Have you considered hiring out as executioner?