[fragmede]

I'm going for, "it could be a serious suggestion."

In other cultures, being rude and disrespectful to other passengers is simply not done, and transgressors are actually punished.

Americans have a problem with public transportation, but the problem isn't public transportation, it's Americans.

[trial3]

which cultures? which public transportation? is it possible that what you assume is the problem is colored by your personal experience and not representative of members of a country at large?