I was thinking about purchasing VBulletin and inputting the ads, like on this site. I'm guessing Google allows this because this site is still doing it. What im worried about is A**Hole members constantly clicking on the ads just to get me in trouble.....should I worry about this?
Everyone would be concerned about click bombing, not sure how google reacts to that. But with vBulletin it would go great!
Adsense generally doesn't perform well on forums. This one is an obvious exception. If you're looking to make money I'd recommend a different avenue, but if you just want to build a forum around something yuo're interested in, I'd go ahead. I almost did.
There are php scripts out there that you can add to vB with statistics. Maybe you can get someone to add on a monitor system so you find out the IP address of clicker and ban/block him from accessing you forum. I have never tried it myself, but it seems plausible.
If you get good traffic then you can make money, my vbulletin pulls about 4k a month using adsense and kontera.
It is the safest, most secure forum out there as of right now. Also, its a lot simpler to adjust then phpBB. If your new to the whole forum deal, try phpBB since its free first. Then if your comfortable and your site is doing well, shell out the $160 for vbulletin.