I tend to agree. When I was still in my teens I took a Greyhound from Florida to LA (don't ask). Bus stops were generally in the most grungy parts of towns, and at each major station stop they would sweep out the bus under the seats - almost always finding bottles of whiskey etc.
A Greyhound bus story:
A friend of mine loves to travel Greyhound, just for the adventure. No one ever bothers him. And here’s why.
He takes a 5-inch piece of rope with him. Once he gets on the bus, he puts the rope in his teeth such that 3 inches are hanging out. That makes him look unstable, and perhaps dangerously so. So everyone leaves him alone.
He’s a good guy. But also a bit weird.