the only reason there are so many CS:S hacks is that its had over a decade of hacks developed for it, as many CS1.6 hacks were simply ported, but Digitally Restricted Hardware is simply not the way to go, a game where the software is controlled server side goes some way to stop cheating, as many mmorpgs are.
there is no way to stop cheating in its entirity, its a part of games, whether its the footballer who puts in a dirty tackle while the ref isnt looking or that noob maphacker on a public server.