I was bemused this weekend to read on Reddit that Facebook was blocking users from posting the innocuous phrase "Everyone will know".
Apparently word spread quickly, causing others to try posting "Everyone will know", which probably only helped Facebook's systems designed to detect spam and unusual activity to get their knickers even further in a twist.
As I describe in my latest video, Facebook appears to have now fixed the problem but it underlines just how easily things can go wrong when trying to keep an online community safe from spam and malicious behaviour.
Also in the video I mention one of the funniest (well, to me anyway) stories ever to happen in the world of anti-spam.
In 2003, Trend Micro issued a faulty update to its email gateway products which meant that it quarantined any messages containing the letter "p".
Here is how Virus Bulletin reported the incident at the time.
Just imagine the problems that caused as Trend's technical support team attempted to apologise for the false positive and push out a patch.
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