I have been on a lot of threads recently where it is quite clear that people have read OP, but nothing else, not even the last post, before they comment.
Has it not occurred to them that things have moved on in 3 days?
It is especially annoying when OP has already apologised and admitted they were wrong- and yet they still get attacked.
It looks very silly when everyone has worked out it was a spoof, been saying so for the last 100 posts and someone pops up and answers it seriously!
I admit to not always reading every post, but I do get a good flavour and read the last page before commenting. If it is very long and has been rumbling in for days then I don't bother reading or commenting.
AIBU is the most usual place that this happens. Probably people are keen to make their point, but not keen to hear other views.