Banned for, you dont wanna know what happened.
Most people I know love animals. I'm no different, although I go for birds, turtles, etc. I don't want to see dogs or cats hurt either, but I would look to someone else to take one in, cause I'm not really equipped for them. But, I have had pets before that were sick enough where they needed to be put down.
Well, I know only 1 person, a good friend of mine, who loves animals (except for my mother, who loves animals even more than I do). Nobody else seems to care though.
It's not a happy thing, of course, but once in a while it's better than trying to hang in there and make them pay for it. I wish the cat all the luck, but do make decisions with your head and not your heart.
It doesnt matter now, anyway. I cant do anything about it 
Banned because that makes sense, but it can get a little excessive. My family had a cat with some kind of kidney problem, and my mom decided to put her down because otherwise she would need some kind of monthly medical treatment that was slightly painful, but would otherwise be fine.
Your mom probably didnt want to go through the trouble of giving treatment to the cat once a month. Seems really insensitive.
"Cute Pokemon always get Parahax!"