Recently the frequent spammer Thierno Sow has returned to MSE. My question isn't directly related to their return, however - rather, I want to ask about a curiosity around the comment system.
I wrote a comment to one of these questions; this comment read roughly "I do not recommend engaging Thierno Sow." When I tried to submit it, I got an interesting error message:
"Comments cannot contain this content."
Experimenting, I found that any comment containing "Thierno Sow" is blocked (although "Thierno M Sow" is not blocked). Another user has commented that their name is also prevented from appearing in flag text. And, when I tried to ask a test question, I got the more specific error message
Body cannot contain "Thierno Sow".
(Interestingly, their name is not blocked from questions on the meta site.)
I'm a little disturbed by this, to be honest. While of course the person in question has nothing to contribute to this site, I am not entirely comfortable with comments being censored in this (to be fair, extremely mild and easily circumventable) way. So I want to ask two questions:
How did this happen? In particular, what is the policy for determining that a given phrase is no longer allowed to appear in comments?
Is this something that the community is comfortable with? I'm willing to put aside my concerns if this is generally accepted, I suppose, but I was completely unaware of it until now, so I would love a reality check.