From wht I hear, future versons will have filters for known viruses (exact search + ext @ certain # of bytes) In the mean time, the easiest way to avoid seeing these is to use the file type drop down list to select the type of media you are searching for. No files with no extention (unless you select 'any type') or exe files (unless you choose programs) will be shown.

Anyone dumb enough to download a file that exactly matches a search they were doing for an MP3 but has an exe at the end deserves to have their computer fry. :P (Too bad the G'net viruses are generally benign and onyl like to propogate)