Chris Colohan writes:

Or 4: the address you chose was not that original, and a spammer using
the "combine all prefixes I can think of with all suffixes I can think
of" spamming technique managed to guess yours.

The chances of someone randomly picking my cryptographic signature for
"faa" on the first try is low enough that a person able to do it wouldn't
be messing around with spamming me.

--kyler