This guy has had these type of Free Speech signs for years.. I mean... atleast decades..since I was a kid... Its always great when you drive on I-5 in either direction, just looking to see what sign he has up next.....

awesome.......

Great post OP... just not sure about where the blogger says that Washington state replied back to anything.. but none the less.... these signs are in fact there all the time....and this local citizen rocks!!!!!