Easy - it means, that bus company didn’t think, that someone would use seat as toilet. Even while it’s kind of obvious, that public transport is used by all kinds of people, including homeless, sick, etc.
You can not make seats that passenger can’t use as toilet(or just puke on them) for obvious reasons, but you can make them easy to clean, so one passenger won’t ruin entire bus.
Not sure. In TF2 I simply manipulated players into chasing same goal, without any actual communication between them. So when players attacked same targets, there was no communication involved - they just want to get kills and I manipulate them into being in same place at the same time by providing teleport.