If Uber Start to banned drivers in no time they will have no drivers driving for them

One Uber driver told me that he has been more careful on what to talk or say with her riders. At times is better not to talk if you feel or see that the rider is moody or having a bad hair day or else you may get reported. Uber listen to riders complaints not driver. Some riders are very sensitive. Would be great if some of you could share on this. Especially on when to talk or when not to talk. After you try having once or the most twice in getting a conversation but no reply from riders, is best to keep quiet.