Originally Posted by INoKnowNames
Again, who exactly is going to come after them for it? The strongest guilds so far have all proven to be weaker than them, with some members capable of soloing entire groups of others. And, as you yourself have stated, the magic army hasn't been seen in action, so we really have no idea if they're this universe's version of Storm Troopers or not. Given how most generic guards are treated in fiction, it's probably a safe bet, though.
No. What you are implying is that the only reason why FT mages aren't in prison is because people are scared of them and they are too strong.
Council could have easily declar FT illegal and make it target for other guilds. Yes the are strong, but they were almost annihilated by Phantom Lords. They can be defeated.