Why do.....

Cause they thing they are sexy. (No, actually they try to save their own ass)

Yeah its like u said. When u call another player hacker if he does something that u couldnt belive that he could do without hacks everyone ll say hacker then u can hack without problems(but if u kill everyone from the enemy team they ll call u hacker obviously...)

Yeah so?
They're hacking right?
And sometimes people call another hacker hacker because you're less suspicious.

TO GET TO THE POINT GO TO THE NEXT STAR*

Well, I hacked in Warrock for a long time (untill i quit) there was crazy amount of things you could do since the game was so shit at the time... You were able to superjump as much as you want (amazing for getting away when someone shot at you ) spamm grenades like crazy (since it was so crazy you can't imagine it, here's a random video from YouTube that i found: http://bit****/R8gjTS).

*Hackers do it since they like being the one in power, so they can beat non-hackers without anyone in their way!