I have thought about this. In fact I even asked Gabe Newell about whether the use of this program might falsely trigger some anti-cheat mechanism within Steam. (He hasn't replied yet.) So, I guess until I get more official information, please proceed with caution and use at your own risk. That being said, that would imply that using Process Explorer or PsSuspend could also get you banned, since those applications also have the ability to suspend threads.