[4gotunameagain]

Not every inconsiderate person is compensating for something. Some people just have different opinions from you about how to behave in public.

And no, I don't have a loud motorcycle.

[rsynnott]

Well, no, but, you know, common things are common.

These, along with various other obnoxiously loud and/or big vehicles, are _strongly_ coded 'insecure man'. Not necessarily insecure about that in particular, of course, but insecure about something.