so viral videos will be fine? I saw some video sites which has music videos out there using adsense but i'm afraid
Maybe you can have a try. Anyway, most of the time, google will not ban those "early birds" because those sites have hugh traffic.
That's technically not true. Adsense is displayed on millions of lyrics sites and by definition that's copyrighted material. I would assume it would be okay to do since so many lyrics sites run AdSense, even lyrics.com and azlyrics.com as a few.
They shouldn't ban those publishers if they're already approved, because they've viewed publisher's website before approval don't you think?
You're allowed to put adsense on any site, even if it hasn't been "approved", which is why they go through and review sites constantly maintain a level of quality. If you get approved, then put adsense on a porn site, you will get banned.