[clairity]

> "...I saw several Scientology ads. I know Facebook doesn't have an agenda per se [...] but I was still struck by the brazenness of advertising something whose ethical dubiousness has been so thoroughly publicized."

scientology is certainly ethically dubious. it's a tax shelter and MLM to financially benefit it's leaders disguised as a religion, which attacks its detractors publicly. that some people find meaning and belonging there is incidental to it's purpose. so no love for scientology.

but why would you expect facebook to ban advertising from them? and why would that be the last straw that made you quit facebook?

facebook (particularly zuckerberg) itself has poor ethics, and that's as good a reason to quit facebook as one should need.