A cookie on your computer being hacked is not a tracking cookie.
Tracking cookies are cookies that will actually record what web sites you visit and report that info back to the site that created them. Log in cookies will not do that.
I've never found a banner add (flashing or not) try to leave a cookie or any other type of programming such as spyware and malware, unless you click on it.
IE does have cookie management and pop-up blockers.
A good firewall will also prevent malicious malware and spyware from being loaded onto your computer.
The only threats I've had on my computer in the last few years were a couple of tracking cookies, and they did not come from OAF. They were from another site that would not let me do business with them unless I accepted their cookies. Of course, I will no longer be doing business with them since I found out that their cookies are in fact tracking cookies.
As for viruses on this site, I doubt there are any in any of the ads. If there are viruses on OAF, they were uploaded to the site in a picture or video. I don't open all the threads here and of course not all pics and vids etc. I've never found any problems with any of the material here. I'm sure Phils web managment has software to stop that before it gets to the site.
A link to another site could also be a link to a virus infected webpage. One must be careful as to what one clicks on while surfing the web.