To ban or not to ban...

[jamz]

...you dont just go into a random match server and download the latest demos if you dont suspect anything beforehands ...

That's right, I don't. That way... lies madness.

...If we come to the result, that "cheating in private servers" is allowed, some others will try that too.

You must know that this would happen anyway? To simplify it, cheaters gonna cheat.

...To be honest, the first mistake was making this issue public, since now any decision made will change how people think towards cheating. If they are not banned, people will think cheating in private servers is alright...

But you don't say what the consequences of the other decision, banning, would be.

I've read all these comments with interest. I posted this because I knew cheat clients were being used in public and I wanted to stop it. In this particular case, I hope I have.
It's quiet clear from the varied responses that cheating in private is a grey area; I won't be making public any discoveries I make this way in the future.
There were three players involved: I've banned one (he has a previous obvious-cheat blacklisting and continued to use the client even after learning of this thread) and let the other two off since they stopped using it immediately. I'm not revealing who they are because the evidence isn't clear-cut. They know what they did wrong and if their 'friend' chooses to make their names public I'll consider that a small piece of justice.
Once again, in doing something new (for me), I've been a bit of an arsehole. I've learnt some things from this thread and would like to thank those who took the time to consider their responses. I'd like to thank those who voted the same way as I would privately too. <3

ps. The ban is on the assumption that you all trust me not to do so without good reason/evidence.