Cheaters in wingman

The reason there are a lot of cheaters in Wingman is that Valve's new Trust Factor system in addition to the Overwatch system does not apply to those 2v2 games specifically. You can still get VACed or Game Banned when playing Wingman though, just like on any community server.

My personal advice would be to not cheat, but hey, if you're going to, wingman probably isn't the place.