I agree with Mr. Gel-pack.

What kind of security is that? If anyone can bring in a print out from a website and convince a screener that those are the rules, then we should all be concerned.
I can fabricate anything on a computer with all the bells & whistles of official DHS/TSA emblems and make it look so official, yet it contains absolute false info.
Getting a TSA screener to change their minds over some website print out is scary, and in this case it was harmless, but maybe next time it will not be.