on my firewall the ports are only open to my bt client. When downloading,everything needs to pass hash checks,and then what you DL will have a text file or 2,maybe a couple of jpegs and flac flies but theres no .exe's or cookies-furthur,we pretty much can identify the seeder to the extent they regged with their email and their ip address shows too-altogather there is much better inherent security in bit torrent than on the internet in general where Gator and "Internet Optimizer" lurk with their bogus crap.