Almost all the spam we get is from people that registered with a Yahoo e-mail address.
Most bounced email we get because of full e-mail boxes and invalid addresses comes from those that have a Yahoo email address.
I'm sick of the insidervlv dot com spam, the "ChEcK OuT tHiS kEwL WeBsItE!!!1!!!one!" spam, the viral marketing, and the bounced registration notification messages. Almost all of that garbage comes from folks who registered with a Yahoo address. I'm seriously pissed off. No more.
From this point forward, Yahoo email addresses cannot be used for forum registration, period. If you want to register for the forums, and you're using a Yahoo email address, find another email provider. Absolutely no exceptions whatsoever. I don't care if you've got 1,000 posts. I don't care if you're a moderator. I don't care if you're FAICP. I don't care if I've met you personally. I don't care if you're got thousands of posts. I don't care if I Google your name and everything that comes back is planning-related. I don't care if you're Jane Jacobs, Andres Duany, or the reincarnation of Daniel Burnham, Lewis Mumford, Edmund Bacon or Israel Stollman. I don't care if you're my girlfriend, ex-girlfriend, or some hottie I met at the Wynkoop Brewing Company in 1999. No Yahoo e-mail, no matter what top level domain suffix is attached to the address - com, uk, cn, I don't care. Everything with "yahoo" in the address is verbotten. EVERYTHING.
If you use Yahoo for email, I highly recommend that you find a new email provider. If you're a member with a Yahoo address, and your email starts bouncing for any reason whatsoever -- full mailbox, no route to host, anything no matter how minor -- you'll be suspended until you get a non-Yahoo e-mail address. Absolutely no exceptions, no matter what; see the previous paragraph. Dump Yahoo as your registered address on Cyburbia.
Again, no exceptions. This policy is permanent - it's carved in stone. It will never change, no matter how much you beg me to change it. NO MORE REGISTRATION FROM YAHOO EMAIL ADDRESSES.