DFC
I find your posting style to be aggressive and lacking in thought.
Reading TMM's first post, it is clear that he heard the other aircraft call with the intention of joining crosswind.
If TMM was briefed that the standard join was overhead, then one can only conclude that the other pilot was either not briefed or decided to make a non standard join.
If a pilot joins a circuit without getting an adequate briefing, then IMHO, that is poor airmanship. Equally, if a pilot decides to make a non standard join (which is perfectly legal), then, again IMHO, s/he must take responsibility for avoiding conflicts with aircraft following the standard procedure and not to do this is poor airmanship.
Finally, I dislike your suggestoin that TMM should get over this incident.
Any reasonable person reading TMMs post can see that it is safety concerned and sending a safety related message to the GA community.
As such, in my opinion, it is serving a valuable purpose, unlike you, so I have added you to my ignore list.