The people who mark posts and get people warned don't go like "it's just a message board dude XD", they weep, sob, scream and then mark posts. The moderator doesn't tell the marker "it's just a message board dude ^_^ " to whoever marked the post, he goes like "YOU MUST BE PUNISHED FOR THIS GRAVE INJUSTICEEEEEE" and warns/suspends the user.
Apparently "man up" and "it's just a message board XD" only applies to the people that are not friends with certain people.
Repeating this made up fantasy isn't suddenly going to make it true.