The first comment under this answer is seemingly by someone with the name "delete". And yet, no tooltip/message appears when you mouse over this name. Screenshot:
For convenience, here is the text version, copied as is, including the name and timestamp:
"Even the most conservative and staunchest prescriptivist commenters admit that there is nothing inherently ungrammatical about so-called “split” infinitives" - really? – delete
Aug 28, 2010 at 22:50"
Thank you in advance for your help.