I've had the same problem. two things:

1. go to tools -> options->filters->keywords and add these entries:

!!!
...

getlaidquickly
/
\
totally hip
top of charts
eighties classic
rare recording
can you afford
steven spielberg

and more as those fake files keep coming from who knows where

2. if any do slip by and don't contain obvious keywords or phrases you can filter then be sure to mark these as junk.

3. help everyone by contributing your knowledge at resources like p2p forums and bitzi.com