Hacker designers may claim their tools are designed for single player, but not only do they work in the multi-gaming online environment, there company won't last a week if they are relying on only players intent on hacking off line games.
They are hardly going to publicize their detection status and "100% AntiCheat proof" for offline single player games are they ?
Lord of The Rings Online Hacks
Dungeons and Dragons Online Hacks
EVE Online Hacks
I can only go off my experiences and that of the clans I deal with, and the new problems they are having to contend with, in addition to the number of players they ban for hacking activity.
I agree since pnkbstrb has arrived detection has improved but the numbers of hackers frequenting servers is still large (though this is obviously a subjective statement)
Though this thread has very quickly gone off-topic - sorry again.