maybe they do, i don't travel much. I don't have a problem with paying someone for a service, the pushiness of some guy who probably was self employed would piss me the fuck off. It's like those bums we had downtown who'd be flagging and pointing to a parking space, "helping" you park and then wanting money. Get a real job you fuck.
Shit, the whole world got some scam and if they can get away with giving you shit you didn't ask for or need, they will and they will drain the fuck out of you. It's sick.
I don't mind tipping at restaurants or where it's always been expected. If you grew up in the US you know that you are supposed to tip 10-15 percent at certain business' and not at others. Fast food places have to deal with every bit as much nagging and stress as restaurant workers and they generally don't take tips. People whining about stuff like that is just petty to me though. You know where to go to if you don't want to tip.
As far as that entire line of work having some dregs? Yes, in fact, they say drug users are most common in that business. And yes, there are certain situations where they'll piss you off or try to rip you off. There have been a couple occasions where either I or someone I know was ripped off by their usually waitress. You'll give them cash and they'll shortchange you on your refund or not bring it at all. Those people hurt themselves in the end because they can't do that too many times without being fired unless we're talking about skanks in stripclubs who get away with shit like that all the time.