It doesn't say not to criticize. It says that if you're going to say "Rand's a traitor," you should maybe provide something CONSTRUCTIVE to go along with that. If all you can do is say "we're screwed" (no, I know you're not, Pete) or "I hate __________________," then what is your point?
Oh no! You mean... the forum aspires to find solutions?!? Here I thought it was just a bitchfest