Is it really a good idea to merge new posts to existing and CLOSED threads? Basically, that is equivalent to saying, “SHUT UP!” since now there can be no reply. In my case, the new post was entitled Generic names with multiple instances which is not exactly the same as the thread it was merged into.
In general, I think it would be a good idea to maybe link the proposed thread to be merged and allow a bit of discussion first before doing the merge, unless you really want me to shut up, which is quite rude.