Twitch raids are the best, especially when its on people who shouldn't be on twitch, like SJW's, kids, douches. I love it when their channel gets deleted after a meatspin troll.
And yes, they are right, you can just chargeback, and some systems you can skip the whole donation part and have your message appear.
So many of them can just invoice or dispute or charge back all of the donations so in fact; it is trolling them and it is annoying. But I have to say I agree with a lot of these raids. Most of them are on these douche bag little kids that should not be streaming in the first place or are just being toxic to the community and these little raids teach them a lesson.