Funny seeing that thread. Even lawyer will cost him more than amount he tried to cheat on freebitco.in. That's not even called serious thing i think, just someone who angry because of they won't able to cheat again on freebitcoin
The accusation here is about 0.0017
BTC, a lawyer will probably cost more if he takes half an hour to investigate the case. So this is a crude threat to get Freebitco.in to release the coins again. Of course you can try it in the accuser's place, but it won't be successful and only costs time and nerves, especially because TheQuinn had already taken a stand and the accuser knows why the coins were locked.