LATOKEN and CoinW are two exchanges that I have had bad experiences using.
I do not want to get into details, as I do not want the exchange owners or workers to identify me.
If you don't want to share the details then don't post at all. It's not a must.
I could also say "Please don't use Kucoin or Phemex because I have a bad experience with them, but I can't tell you the details" See? Would you really believe me? Nope. Not a chance.
I could just be attempting to malice or FUD the two exchanges for all we know. An accusation works well with evidence.