Lately we have been hit with a lot of bots, which are embedding spam links into posts. To help at least slow this, we have changed the text input box pulldown. Now you will need to change the input from Plain Text. Here is what it looks like, using my Signature as an example:
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Technical Director
Read enough Facebook and you have to make Sanity Checks. I guess FB is the Great Old One of the interent these days... - Beamrider