Re:Why we’re removing comments on most of Inquirer.com
by bravura on Sunday March 14, 2021 @10:22PM
(#26461937)
And, of course, graffiti has existed even before written language.
https://en.wikipedia.org/wiki/Graffito_(archaeology)
[edit: top comment on the top comment's top comment!]
It's a lesson that definitely pre-dates computer-mediated communication. I've seen freely accessibly physical noticeboards quickly fill up with advertisements and suchlike, posted over the notices for which the noticeboards were actually for, for one.