If there is evil at Facebook, I haven’t seen it.

For me Facebook's relentless race to the bottom in terms of privacy, their underhanded tactics on re-fiddling privacy setting defaults and their relentless push to try getting me to give up ever more private data was evil enough for me.

Evil enough so that I "deleted" my Facebook account and don't intend to use the service ever again.

Your mileage may (and apparently does) vary.