As far as I heard, there has been an increasing number of complaints on many sites and, and, according to some sources, offensive or very rude comments were removed (most certainly by robots on the big communities), and with them, valuable information by correctly behaving users disappeared often.
But since more recent times, "filtering" programmes have been improved.
As far as I heard (from Rooster) about Quora, they seem to have very strict rules, and want professionality.
Maybe that asking the administration for an explanation might help (without "yelling" at them, of course).
Yes, we are lagging behind!