It's much safer than pushing out of the bus. Waiting on buses can lead to a different sort of pushing as the annoyance of wasted time waiting on unreliable transportation becomes more than the average person can bear. Who wants to enter a crowded bus? Those who no longer care to wait for the next crowded bus. Excuse me, pardon me, excuse me. Is that seat taken? No, no, no. That's o.k., I'll stand. (Sigh) Excuse me, pardon me. (sigh), STOP REQUESTED!!!!!!!!!!!!!!