They're crap, shared on the network to sabotage p2p.
Try using this hostiles list (click below for more info).
The TechNutopia Fullsize Hostiles List for BearShare and LimeWire
If that doesn't help, you can also use LW's junk filter to mark the files as junk. The filter takes a bit of playing around with, as it 'learns' over time...check out the thread below for more info.
Junk Filter