What they are doing is normal, I don't see anything wrong with it. If the file is not yours, you really don't have any right to complain because you stole it. Filesonic or any other filehost has the right to take back what isn't yours - no matter how often they take down stuff due to DMCA complaints. I really hate it when fellow uploaders moan about this when they don't have the right.

If and when Filesonic goes down because of you noobs reuploading the same copyright content over and over again, it will all be your fault.