The crosshair are just an image... I think, so those can be removed. But if the game can zoom with the mouse wheel, it is done internally and you can not affect it externally).
I would like to take the time to say how much of a piss poor job true combat (CS Ripoff) implemented this system, instead of being smart and making it MORE accurate to zoom in, they made it so your shots randomly veer off at very screwed up angles, not EVERYTIME YOU SHOOT, but only when you move... it makes a random point and aims at it. Yeah, I hated that game... don't even get me started on how burst firing doesn't improve accuracy and you can just hold the trigger down and get the SAME accuracy.
If you fear speaking for yourself, make use the words of others while discovering your own voice.