I would be happy to talk about it! My family can't get me to shut up! ;) I'm a volunteer raptor rehabber and an apprentice falconer, so I think I can answer your questions. /formal

How they handle entirely depends on the species; Harris hawks are almost like dogs, Cooper's hawks have the nasty tendency to land on your face instead of the glove, bald eagles wish to kill your firstborn, and merlin falcons are rockets. This is of course general humorous species stereotypes, all kinds of factors go into it depending on how they were raised and trained.

The keeping of raptors in the US is so heavily restricted for two big reasons; one, it takes a lot of specialized knowledge to keep a raptor healthy in captivity, inexperienced/unknowledgeable people can easily kill them by accident, and they can be very dangerous;

and two, the whole deal about the Migratory Bird Treaty Act, a tl;dr version of which is "all our birds were gettin' screwed because there was no regulation on taking them out of the wild, so we put them on lockdown." Raptors in general suffered a lot because of being apex predators, so they got the short-end of the DDT poison stick in that the poison culminated up the food chain and had the worst effects on them, plus prior to that they were basically shot on sight by people who saw them as competition or a livestock threat.

With all the restrictions currently in place incidence of abuse or neglect are practically nonexistent. With things like wolves or tigers or monkeys, in the US it's very easy to simply buy one or wait a week for a permit and boom, you've got one, without actually knowing how to take care of it. To legally keep a raptor in captivity, you have to jump through so many hoops and dedicate so much time to prove yourself to earn the privilege, so "impulse buys" or getting an animal without truly knowing what you're getting in to are impossible. Due to the legal requirements you also automatically have a network of support from other people qualified to care for raptors, so if you realize it's not for you or suffer financial ruin- which is a primary cause of many situations like people giving up and neglecting pets like tigers- there are plenty of people who you can give your bird to.