Here's what happens when you write a letter to your Congressional representative, in this case opposing Stop Online Piracy Act. I used a recycled envelope, sent to me by some bulk mailer. I taped a label over their return address, applied my own "Forever Stamp" (complete with an American flag, of course) over the "Put stamp here" block, and mailed it. There were no markings to indicate it was a recycled envelope.
So we have someone either in a Congressional mail room deciding what type of envelope is worthy of entry, or we have a U.S. Postal Service employee playing political mail cop. There were no markings on the envelope and nothing to indicate it was a recycled envelope. I think recycling an envelope is the very type of thing our esteemed Benjamin Franklin, our famously frugal and first Postmaster General, would have done.
In fact, You Who Didn't Have the Balls to Sign Your Name, I pay your salary. And maybe I'll stop. Maybe I'll vote against whoever put you in your job. Maybe I'll rethink what type of delivery service I use. I hear the USPS is making huge cuts, and maybe you're next on the list, because I am forwarding this information and your clever little critique to the Inspector General's office, because I hear tampering with the mail is a serious offense. Perhaps tampering with Congressional mail is an additional felony or two.
BTW my Congressional representative has an email address, too, so I can save my 42 cents as well as the cost of a new envelope. Happy Holidays, and let freedom ring.