What the heck is going on here?

LibreCAD is a great program and the people of the forum have been a great help to this newbie but ... in the words of Red Buttons "Strange Things are Happening"

Early on I noted that all the entries by someone named NOGGIN had been deleted.  Seemed odd ... but maybe he was a troll and supervisors deleted him.  Seemed to be a persistent fellow and didn't seem like the right place for a troll, but who knows.

Recently I asked some questions and got some really useful answers from a fellow.  Now I go to the postings and they all say, for his entries, deleted by owner.  Now, of course, that is his right but ... WTF?

Is this normal here?

-----Paul-----

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I don't see any reason to go private on this.  Not trying to raise a big stink, either.  Main reason I'm concerned is that the answers I got were very valuable to me and I would think to some other newbie trying to learn the program.  I have the texts of the posts and could repost them under my own Avatar but don't want to offend the real author or his rights.  So I figured I would ask whether there was some policy that was being enforced or some other reason.

Thanks for the reply.

-----Paul-----

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OK, so ...
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http://forum.librecad.org/distance-along-an-angled-line-td5708029.html 

shows content deleted by author.
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http://forum.librecad.org/Relative-Zero-Point-td5708013.html

previously also showed content deleted by author.  Now the content is back but the author is unidentified.
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and while this is not one of my threads, http://forum.librecad.org/Why-do-we-now-allow-advertising-in-this-forum-td5706874.html has a lot of deleted posts.  
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Seems odd.

-----Paul-----

Hi Paul

I've sent you a private mail to explain things