I reserve the right to criticize your map/addon/whatever else you decide to stuff out.
Out-right flaming isn't helpful, but pointing out the flaws in a modification, however obvious to everyone else, is part of the process of refining user-generated content.
"Veterans" aren't necessarily older than newer members, but are more familiar with the history and practices of the forums and the game. Because we have been around awhile, we have seen a lot of the same problems over and over again and it gets very frustrating sometimes.
I believe the term is "lurk more".