Yes, I believe he, and/or one of his staff, must be lurkers....last week I posted an obscure part of a financial newsletter I get that explained how many JOBS have been CREATED in the last few years.....and Rush was quoting from it.
Every talk show on the radio, every TV News Department, has a producer (at least) on this site all the time. Part of the job.
Wouldn't be 'tall surprised if our friendly, helpful, and efficient government monitors us, too.