Although the Wrath of the Lich King Beta has been up for months now, I acquired my key rather late, and one thing I noticed right off the bat is that the quality of player behavior takes a sharp dive on the realms.
It's a well-known fact that Internet anonymity morphs regular people into asshats, but because Beta testers are not connected to their guilds, in-game names, realms or friends, evidently, the anonymity factor hits the roof.
My minty new Death Knight had her deathcharger "stolen" from her, among other things, and mobs and pick-up items are high commodities. The general chat is filled with derision and insults, and the extreme lag helps none of this.
What kinds of experiences have you had in the Beta, with either surprisingly helpful players or extremely aggravating ones?