How the hell do you use multiple NOT values with rlm_checkval and sql??

[Mike Jakubik]

Ok, so after much frustration someone finally pointed out that using 
multiple values with checkval and sql is possible wen using the += OP. 
Great, now, how the heck do you specify NOT items? I want to specify the 
numbers that users can NOT dial to. This seems impossible. I have tried 
regexp, and using the !=, !~ OPS, none of the methods seem to work. I 
never knew Radius's configuration would be so frustrating... I'm ready 
to start pulling my hair out, someone please save my hair!