My brother's college roommate told him about some servers with a no swearing policy that were a lot of fun to troll on. He got my brother into it who then got me into it. Started to actually like playing on them though, so I joined.
Just to give further details, we would buy and throw smokes quickly to make the entire spawn area on office really hard to see in. We would also work together to make sure the majority of our team stayed blind from flashes until their demise. Do them enough, somebody would swear and then get warned, kicked, or banned. This was CS:S btw. CSGO hadn't been released yet.