I hate them very much but they're actraully quite stupid

So first I played HL1 and all those other valve games for like a year, so I finally got off my ass and figured out how to get CS. All that time all I needed was staem. I was like Shwoot!!! So when its all installed and stuff I type in my CS cdkey "Already Taken" I was lik err... tried it 5 more times "Already Taken try again" so I grab my ALL my other CDKeys (HL1, Teamfortress, BlueShift, Oppising Force) "Already Taken" "Already Taken" blah blah blah. I'm extremely annoyed by this point so I just give up and send them message after message for about a month when my friend is finally like "You want a free CS cdkey?" "i was like YEA!!!" So I put it in and played for a little while. Then they (Valve people) come to the conclusion that i'm "hacking" so all my steam games are VAC Banned. What is up with that? I dont even use hacks. So in frustration I somehow stepped on the power off buttton on my powerstrip cutting off the power to my computer. I turn back on and i'm not banned anymore. Kinda strange but great luck

Thats my story