Summary:

I started receiving unwanted SMS spam from 265080.  These messages can be stopped by blocking yourself on the AOL SMS servers.

Details:

Go to http://aolmobile.aol.com/portal/blockim2sms.do and register your phone number.  They'll send you a quick confirmation text message - which should hopefully stop unwanted SMS messages through their gateway.

Seems quite silly to have that enabled by default on all numbers - a bad default policy I think.