Yes, but they would probably arrest you instead.

better be VERY coded language that a jury would agree is innocent in nature and intent.

"Free Donuts, corner of 12th & Main. Tell no one."

might be better to have a bunch of gibberish with a few named places.

They might think it's code and deploy there, and you're not actually making a legitimate threat they could come after you for somehow.

You could then troll them even harder by giving them a real threat to scatter over.