Discussing a player's play with the person who just folded.
What is your take in a tournament, when someone who was not in the hand, but the person next to him was and once the person who was in the hand folded, the person out of the hand started discussing what the other player should have done based on the winner's play. They did not try to disguise it but were mumbling about it. It seems to be inappropriate to assist a person in a tournament that way.
I don't try to "help" anybody at the table, nor do I like to see others "helping" either. But as the previous poster said, lots of hands get discussed. But one other point I wanted to make is that this discussion may very well be disguised as "help," when it is, in fact, about gathering information or manipulating future action.