I tried to comment to this user, trying to ask why he left non-commented links in comments, that were links to the question itself.

I got the message Comments cannot contain that content:

enter image description here

After rewording and rewording I noticed this is because of the content of the user's name that gets inserted by typing @+C+Tab.

How can I comment to this user without using the (blocked) full name in a way that he will be notified of being addressed?

For now I flagged the link-only comments, that are without any explanation, as non-constructive. But I rather ask the poster for an explanation of intentions and potentially improve his commenting behaviour.

  • 2
    Another question is why Stack Exchange allows a name to be set to this kind of text if I am not allowed to use that text to address the person. If that content is offending in some way, it is still showing up beneath questions.
    – Anthon
    Sep 12, 2015 at 13:18
  • You can use the three first characters: "Cir". You're welcome. You can also use "CiroSantilli" for the maximum extent possible.
    – EKons
    Sep 9, 2016 at 7:55

1 Answer 1


Presumably, the links are relevant to what the OP is asking. I let them stay, there might be some useful info there. As for the other bit, you don't need to @ the user if your comment is right under theirs, they will be notified anyway (I think).

Also, you should be able to @ ping the user with the 1st three letters of their name. All of these should work:


As for why, that's probably because Chinese and Korean characters are blocked due to excessive spam in those languages. I know that's the case for titles, it seems to be so for comments as well.

  • The first link is a link to the question itself, so it is implicitly relevant, but also useless and irritating, because you can't see that self reference without following the link. I tried @ciro and see if there is a reaction
    – Anthon
    Sep 12, 2015 at 13:38
  • @Anthon oh, I hadn't realized (which nicely proves your point). Still, some of the others are presumably relevant.
    – terdon Mod
    Sep 12, 2015 at 14:57
  • Writing @ciro worked, the explanation was that the same three links were inserted in other comments as well.
    – Anthon
    Sep 12, 2015 at 17:56

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