Did the OP do it to get a reaction? Yes
Did he have a constitutional right to? Positively Yes.
Did the TSA over-react? Absolutely.
The OP needs to contact the media and the ACLU. Why? You did it to get a reaction - to make a point - you have a obligation to carry it through.
One idea: Pick a day and have thousands of flyers go thru security with the same Kip message. I think TSA would get the message...they're slow..so repition is important.