They are not coming from THIS site, they may be coming from links that have been posted here.
You should always be cautious when clicking on any link, anywhere.
I have had my antivirus program go off when searching the net for quilting info and clicked on a link found during a search. The people who are responsible for these virus's can plant them anywhere, on any site.
Keeping your antivirus program updated is your best strategy to keeping your computer safe. :D:D:D