You know what, I'm going to put out a few responses to the very selective "evidence" they've added to their little ban message:

TiA's creator admits TiA is a hate group

More accurately "TiA's creator was unhappy with the direction of the sub, and has since turned it around"

A TiA mod resigned because of that

Putting aside the fact that this wasn't about whether this was a "hate group" but more about the sub taking on a more serious/angry tone, recognising problems and fixing them is a part of running a sub.

TiA is known to the Internet as one of the Reddit's main harassment sources

Utter bullshit. "Some guy on our side says this" is not evidence, and it's worth mentioning that we're very strict on harassment. Interestingly now and then we'll get someone come in claiming to have been harassed, yet to date the overwhelming majority are unable to provide any evidence at all. Most of the time it turns out they simply didn't like the fact that their silly comment got featured.

A TiA member was arrested for "terrorist threats" after boasting about it.

Random user makes a couple of off-handed comments about trolling Yik-Yak and gets banned almost immediately. Blaming this on TiA when this user had posted there maybe twice in a year is just dishonest. Guy regularly used /r/cysticfibrosis - are they now a hate sub?

Which the community supported and asked how to join in on

Guy's posts mentioned nothing about the content of the messages he was sending, so this is another dishonest smear. His comment was "My roommates and I spoofed our gps and are trolling your yik yak. It's fantastic.", someone asked how he'd spoofed a GPS. Clearly this is proof of a HATE GROUP OMG.

So yeah, I'm calling out /u/yellowmix or whoever wrote this spiel, because it's so dishonest you might as well just be upfront and say "we disagree with TiA on political grounds". TiA is not a hate sub, deal with it.