What to do about brief text messages with misspelling?

> What else can we do about this spam?  The sending computers are all
> listed on the PBL, which we don't currently use.  Is this our only
> hope?  I'm reluctant to use that blocklist because we have clients on
> networks that are listed there.  Using it would force clients to use
> authentication to send e-mail, generating complaints from legitimate
> users.  Yes, we may even have legitimate users in Peru and Viet Nam.

I'd bite the bullet, use the PBL, and get your Asian clients to fix their 
configurations.  It's one time pain for long term benefit all around.

R's,
John