If that's the case, then fine, I certainly think that you should never strap anything to your back when doing anything involving more velocity than walking (well, maybe skydiving, but that's a very special case). It was just the caps saying 'don't do it' - if I've misinterpreted, then apologies.
Motorcycling is one of those interesting subjects which lots of people have a strong opinion about, including those who've never actually partaken.
I don't think I could cope with doing my stressful, unpleasant job, working for obnoxious people if it wasn't for my bike. (The only reason I do that job is that it pays quite well, and it's the best way I know of providing for my family - otherwise I'd quit). The bike gives a sense of freedom and control, a self determination away from reliance on others seldom found in modern life.