If someone thinks that they have had an aggressive pm, then the best way to deal with it is to publish it in full on the thread. Then there is no ambiguity about what has been said, and no chance of veiled but unspecified accusations poisoning the atmosphere.
If the pm is indeed aggressive and bullying, then the whole of Gransnet will join in condemning it. If it is not, the sender will not be tarred with vague suspicions. There was a spate of nasty pms a little while ago, which led to peopleleaving, some of them because they were so hurt, some because they were asked to go. Please don't let the forum get into all that again.