Smitty Two wrote:
I was in email contact with an agent recently, and decided that she was
not responsive enough to my needs, so I informed her I would look
elsewhere. That seemed acceptable to her at first, but after a couple of
days of chewing on it, she apparently went off the deep end,
constructing a vicious written attack that I would characterize as rabid
or psychotic.

I have written to the owner and manager of the Century 21 franchise for
whom she works, but since she's a top seller for him, I'm not holding my
breath that he'll concern himself too much with my complaint.

So do any of you happen to know whether there is a procedure for formal
redress of grievances against agents? Are they sworn to uphold some sort
of code of ethics? Does Century 21 censure its agents if they misbehave,
or are individual franchises free to operate however they choose?

You have not given enough detail for us to offer you advice. If you
have a complaint, the local board of Realtors is where to go.
I tried real estate business for a while and did not like it. You could
work your tail off for a client but only made money if a sale
transpired. Maybe that was her frustration.