How about an option to include an automatic screenshot when you get a kill? The screenshots would be stored in a separate directory.

I doubt thats useful.. at times you do not even see the other player when you kill him. think of grenades or slow rockets.
Also most play at lower settings to have fast fps so i'd rather record a demo and watch it at high settings to make screenshots by hand.

If you want to mod it and make a patch for us, the more power to you.

I don't mean to burst your bubble, but people who post things like this should think before they do. nobody would really find this useful. I'm not saying that you, or anybody should stop suggesting things, but think to yourself "would most people use this feature at least once a week?".

Well, I don't wanna have 800 screenies more just after a hour on my domestic server

you wouldn't like the 1 second freeze of your screen caused by a screenshot, I think.