Scientology is suspected of murders, and IIRC there is a very credible allegation of infiltrating the IRS to manipulate taxation of the church.
They eschew all medical treatment, not just cherry picking like the dubs. They're accused of not allowing women to make noise during labor and not allowing medications at all.
If these things are true, I can't see how dubbery is more dangerous than that. And that's even from my perspective. (Obviously I personally know jwism is very dangerous.)
Lisa McPherson's memorial was vandalized. I don't think that happens an awful lot at the hand of dubs (I'm nauseated from saying anything positive about the dubs--actually I am just saying they're only slightly less soiled than the darkest of all).
Oh, and they're still at it.