I've gotten all of my warnings, bans, etc. successfully appealed. It's crazy how easy it is to get someone reported. One time I got banned after calling out a bot spammer who openly admitted to abusing the reporting system with their bots. Then they said they were going to get me banned, and they did. It took almost a week to get unbanned after filing an appeal and the person who did it still didn't get banned!
Their whole system is a bad joke.