I don't know exactly how deep Warden can query your PC, but if it can query on the policy level, it's going to see the changes this application made.
And while not entirely incriminating, you are obviously thwarting Warden for some reason with this. So logic would dictact you're up to no good.
However, if this gives the option to ONLY hide a particular process, I.e whatever hack program you are using, you'd be better off using that option.
I don't know about you, but no PC I've ever seen just has system,System idle, WoW and Svchost running on it. Highly suspicious if you ask me.
You'd be better off with IS, and ISXWarden.