Theroretically no. You can put a big sign that says "I snort Heroin daily" and they can't stop or search you just because you are exercising your right to free speech. If they do stop you make sure you politely ask why, and if they make a comment about the sticker you can get their name and report them to the NAACP for violation of your rights. Hemp rules! There are many an item made out of hemp that are just outstanding and the best part is that their environmentally friendly.
I am a Paladin, like the warriors of old, ready to stand on the line to keep others safe... A Sheep Dog, ready to protect the herd from advancing wolves!