Lucky you, but not everyone is like that. Most people would beat themselves up over this stuff.
do you care about any of the stupid posts you surely made in 2011?
someone who'd stress themselves about stuff that happened a long time ago is probably not doing it just because they posted research they drew a long time ago. it is more likely that they have self-esteem issues anyway, and if it wasn't that, they'd just be dwelling on something else they did
and even if that was the case, stopping someone from doing something harmless because you think they'll be embarrassed about it later is kind of presumptuous