Intriging Question

In about 5 minutes past i made up my mind that what i saw was really happening... i used a menu hack and a hotkeys hack,(and i won't gonna say which is which 'cuse it may not be relevant to this case) and all worked smoothly, everythings fine with the hacks, but when a invibility hacker enters the room(and I mean a real invisibility hack, not those recent 'invisibility' hacks that just got released on onehitcf and others), all my game screen gets pitch black...
I tested this teory over and over, so that i would make sure it was from the invisibility hacker. And just for your information i think there's just 3 invisibility(100%) hackers in CF EU. Mourinho, BARACUDA and oliveros. I don't know if it happens on porpuse, if it is a feature that makes part of their invisibility hack, or if it's just a pure stupid coincidence. Said that, what i wanna know is this:

Is it possible to make a hack to fuck up with other hackers?