emp said:That niche was only an example.
The real question was: Will there be paid ads or will I be stuck with red cross and Amnesty international?
To put it differently: If the Google Adwords shows me a phrase, will there be ads for that?
The example "accused priests" in the article seemed as unlikely.
::emp::
Well, with a niche like that you can imagine how many lawyers would jump at the chance to sue a priest. There's an incentive of cash and press in it for them. So if you can't attract good adsense ads, there's always the option of charging for ad space with law firms. Be creative!