Probably correct. There are viruses out there posing as mp3's. And of course they will not load on Mac OSX. I have been personally arranging my search results in different ways to block out the spammers. One is to arrange by bit rate so those search results that show zero bit rate are at bottom of list. I then ban those ip's (control click that file in search result). Problem of course is spammers are generally on very large networks, and they change their ip's. They might even change their ip multiple times a day, surmising there though. Their ip's often tend to come from similar area in USA (via same isp.) Another issue is the more popular a search is, the more the spammers target it. Need to be very careful about banning ip's however. Including the network ones such as 10.x.xx or 192.xxx

I also check for program listings in search results which are obviously duplicating the search title when searching for music (using audio or general search type).

Oh ... certain file sizes too. The obvious ones which are under 1,000 KB, but also there's been reported a couple new sizes around a few MB in size which are spammed. I can't recall the sizes, I think one is around 3 MB, the other 5 MB. Check forums, I know the sizes have been reported here.

BTW I'm not so sure iTunes for OSX allows you to go backward in version without iTunes coming up with a message that it refuses to load the older library. It apparently has worked for Windows users who used only earlier v. 7 iTunes versions. So in that case if you really wished to use an earlier version of iTunes, it'd be best to back it up, remove the present one or delete it. Then re-add the older files (can do it by drag drop of folders onto iTunes Library icon.) Unless someone has a better idea.