I have been banned from cruise critic a number of times. Now I very seldom post unless the remark is so blatantly wrong it could cost cruisers their cruise or a lot of money.
I like to help people - answer questions and I'll offer advise to those who are booked direct or with someone else.
I would never purposely say something derogatory about another company or TA however, I would point out if they are giving misinformation which is not usually being done intentionally.
If I'm wrong, I know I'll be corrected - gently by the "bosses" on here