Perhaps you've seen one or 2 roaches on the bus once in a while.
Tonight, I spotted at least 11, possibly more, hiding in the gaps
around the rear side window. Here's just one corner:

Posting this in a sh!thole like STomp would certainly raise a huge
heckle, but it would ultimately be useless, so I informed the
driver before I alighted instead. I couldn't resist posting here
however, it's just too irresistible to share. 
*Edited spelling of 'irresistible', and realised that there were 8
roaches in the photo alone*