Is there a spam mole inside of Ameritrade?

["Richard M. Smith" <rms () computerbytesman com>]

http://yro.slashdot.org/yro/07/05/30/1444236.shtml 
 
"On April 14, 2007, I signed up for an AmeriTrade account using an e-mail
address consisting of 16 random alphanumeric characters, which I never gave
to anyone else. On May 15, I started receiving pump-and-dump stock spams
sent to that e-mail address. I was hardly the first person to discover that
this happens. Almost all of the top hits in a Google search for "ameritrade
spam" <http://www.google.com/search?q=ameritrade+spam>  are from people with
the same story: they used a unique address for each service that they sign
up with, so they could tell if any company ever leaked their address to a
spammer, and the address they gave to AmeriTrade started getting stock spam.
(I don't actually do that with most companies where I create accounts. But
after hearing all the AmeriTrade stories, I created an account with them in
April just for the purpose of entering a unique e-mail address and seeing if
it would get leaked.)"

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