I have my own comment system with some rudimentary spam protection. Recently I started getting a few comments that appear to be automated with the name "XlsUoIGh" and the content "doors.txt;10"
I deleted the first set of comments, thinking it was probably nothing. However, they came back. They're constrained to one page and usually only 2 or 3 are posted. I've heard online that this text serves as a "bookmark" for future spammers to find and use. Is this true? I've also heard of similar pieces of content being posted like "door.txt;6" What does the number mean?