Supercell continues trying to level the playing field (at least in terms of hacks and cheats) in Clash of Clans [Free], and as the latest update claims, the efforts have been quite successful so far. The Fair Play status update claims that so far, they haven't had a single false positive even though they've checked even remotely-suspicious cases. The update then goes on to clear up community questions and concerns. Specifically, using Bluestacks or other emulators won't get you banned, playing multiple accounts on one device will not get you banned, playing on a jailbroken/rooted device won't get you banned, and screen recording won't get you banned, unless it changes gameplay in any of Supercell's games.
Supercell hopes that these clarifications will allay community fears of what is permissible and what is not and quiet those who've been complaining about the company's actions. My guess is the majority of the community would prefer playing a game where no one is using hacks or cheats. If you've been banned and you think you didn't deserve to be, make sure no one else has access to your account and ensure you were able to remove all traces of any mods you were using in the past. Check out the update here.