[Mosslah]

You don't have to create a bot to ban somebody using hacks, you could just use an anti-hack system which would automatically ban hackers instead of making a bot ban players, as it's pretty much the same thing but a bot is has an actual avatar in-game (if you mean by an NPC character) while a simple anti-hack system wouldn't have to have a "physical" form.

There are a number of anti-hack filterscripts that will do this job for you, without having to create your own. And I guess you could use the already created anti-hack systems to help you build your own.