To rename a user's post is an insult to that user. Basically you are saying they are too stupid to properly name their thread. Once again, it is their prerogative what they want to name it and as long as it does not contain offensive language, it should be left alone.

We as moderators should lead by example. It is not good example to post the same info in a half-dozen different threads (cross-post).
Nor is it good example to dredge up old threads without adding real value to them.
Nor is it good example to not respect the guidelines for forum content.

By so doing, it sends the message that everyone can do likewise.

So, if the suggestion is not KiX related, confine it to General, and don't post to Beta that which is not directly related to the current beta. Remember that in Suggestions and Beta, we are borrowing Ruud's ear and so should keep content relevant and concise.

Also, it is not necessary to post the same message in multiple forums. The only exception perhaps, is the announcement of a new release. That is always cause for celebration!
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.