Simple Role to enable/disable the ability to receive SMS Blast

Hi,

I've the simple need of disabling certain user from receiving SMS.

So they should be enabled to register their phone number, but not to receive Blast messages. I was thinking about a "simple" default user Role, say "SMS enabled" to wich the admins could un/subscribe the users. That Role could be inserted by default upon installation of SMS Blast.

This would give a simple way to enable disable certain user, adding only few line of code to the module, and without dependencies.

There is already a similar solution?

Could it be interesting?

Anselmo