Load of rubbish im afriad, I actually cannot remember the last time i've encountered a hacker online, they really are not common at all. Of course plenty of people accuse anyone who is especially good at a game of hacking, so theres that.
EDIT: also, things like quickscoping are NOT hacks, you may well think they arent in the spirit of the game but as long as something is within the realms of the games mechanics they are not hacks.
how to deal with this? future games can either incorporate them into the games intended mechanics, or design their game to remove them. (much like how many modern games slow you down after jumping to make bunnyhopping impossible, or how TF2 forced the sniper to charge up his shots to force a slower pace to sniping)
EDIT: also, things like quickscoping are NOT hacks, you may well think they arent in the spirit of the game but as long as something is within the realms of the games mechanics they are not hacks.
how to deal with this? future games can either incorporate them into the games intended mechanics, or design their game to remove them. (much like how many modern games slow you down after jumping to make bunnyhopping impossible, or how TF2 forced the sniper to charge up his shots to force a slower pace to sniping)