Replying to Another NS Ad rant

I am so pissed about all these ads that keep messing up ns. Ive had a couple that I dont even have to click on anything it just takes me to their site. I was reading a thread, hit back, then some ad took over ns and sent me to their site.. this happened quite a few times. Plus there have been other ones like the circuit city ad that drops down and if you click anywhere on the screen, it sends me to their site but at least this one didnt take over my ns it just opened up a new tab. 

Side note, I know some people were talking about good ad blockers awhile back but I forgot what they were. Someone wanna let me know what they were?