They are just overall bad players of this game. thus being the worst zerg guild on demise. players like bama, and JMonroy. they are one of the biggest guilds yet most members are newbs. their vendors are newb vendors selling some of the Worst items, over the worst zerg guild on the server.
Hmm, I don't think Bama is in D*A, but I could be wrong. Nice of you to think of me though, but I believe a zerg guild is a guild that brings a lot of people to do something that should require far less. In pvp, that includes bringing 10 people to kill 2-3. In pvm, it would require many people to kill things, like taking 10 to kill swoops or peerless or whatnot. I actually haven't done either in a while, and I haven't even tailored for about a month, but who knows what the pvmers do, you could be right.
Also, let's not forget that you were in the guild at some point. You were kicked out and we're bummed about it until you were added again. You left a while later when you got mad at me for selling my items if I recall correctly. Let's not forget that you make your money just like I do (burning runics), so me and you play the game the same, I just do it with a different attitude.