1. I have seen too many to count around here on DA, once you click the link it downloads it self to your computer. 2. as I said before, it downloads its self to your computer, and hides in your files. 3. not always, and yes ads can have hidden viruses in them. you can find out about it if you read the Deviantart News.[link] 4. some people can't afford the pricy stuff. the free stuff works just as good if you have a ad blocker.
also most anti-spyware scanners tell you where you picked the virus up.
To add on to the fun, why click ads? and why click unknown links? hover the mouse above the link, and atleast in chrome i can see where he link goes, i don't click it unless i now the one sending it and the site it sends me to
I haven't seen any bots, but the virus that dA sometimes gives (it might be from the ads, I'm not sure) recently affected one of the people I follow, although I haven't gotten it since I first visited the site. Thanks for the heads up.
I haven't seen any,I hope it's not that stupid rouge anitivirus 2012 virus,had that virus twice,you know how hard it is to get rid of? O.O; I so hope it's not that....stay safe everyone and I'll stay safe to just in case =3