Download Managers
 

I run alot of video sites so I couldnt block dl managers because people really needed them. Now I have a program that streams the vids or allows visitors to zip them and Im noticing alot of these dl managers are a hazard. Some of these morons download everything right down to the friggin html.

So, my question is how do I block them ? I know some guys use a huge htaccess list but is there a way to use just a few lines and get the same results ?

Thanks in advance