personally i hate qsers as it takes no skill but i dont mind the real snipers who take their time to get the kill. Think all qsers should be reset to beginning rank or just banned from xbox live. But thats just my humble opinion!
Learn to quit abusing exploits and use a sniper properly. A sniper has a license to park his ass in an elevated position; if you can't kill him before he kills you, then what does that say about your skill level?