Well, not detained... but contact was made.
Took my son to Seatac for his flight back to NYC. We preprinted his boarding pass so all we had to do was get in the security line which turned out to be several miles long today. While watching him go thru the line, some TSA officers kept me under watch, then pointed me out to a plainclothes person with a earpiece. After about 35 mins a Port Police officer made contact with me.
My phone was on my belt so audio did not work to repost (will remember that for next time). The conversation went like this;
OF- I know Open Carry is legal BUT...
Me- I am waiting for my son right there in the green shirt, as soon as he is thru the check point I will be on my way.
OF- Well, could you just put it in your car for now
me- No, as soon as he is thru I will be leaving. Unless you will walk him thru security and to his gate?
Of- No sir, I can't do that... be aware that a supervisor will make contact.
After a bit a female officer walked right in front of me (personal space close) to join the other officer(1st pic). About 15 mins later, 2 more officers showed up(2nd pic). No more contact was made with the officers except for me giving the a hand salute on my way out.