I know that I can preview and stop a download, but that doesn't stop the file spreading through Limewire.
If I get a dodgy file downloaded, I immediately delete it from my shared folder. If you don't, you can seed the file thousands of times on peoples PC's and it multiplies instead of disappearing. You can block the host, but it could just be an innocent recipient of the file who didn't delete it.
IS there an answer..........can't think of one.