It is a boundary that certain individuals push and push and push. Some boards move the line to give the boundary pushers more space (or ignore when they are repeatedly over the line), some places (here) are obviously trying to figure out what to do about posts like these, and others ask people not to push the boundaries, then ultimately end up banning posters who can't respect the board's guidelines.
I suspect it is tougher to manage here, because anyone who posts here is an EAA member and the EAA is <probably> pretty leery of denying posting privileges to paying members.