no thanks necessary. i enjoy this site without distractions of various vulgarities of body parts, senseless, puzzling memes, and that sort (although sometimes those things are funny). i can get in, educate myself, and leave well-armed.
whistles...i dont know. if i heard a whistle, id think "police", and something very seriuos. i wouldnt be looking for ordinary-clothed anons or scienidiots. but then again, if i had a camera, and heard whistles, i would think "great photo opportunity to get something important" .
i think you hit it here--> "I suppose if a few watchers are armed with whistles". a group of about 5 for every 15 protestors? good idea. yea, i dont think giving anonymous cake (sugar) and WHISTLES would garner the warmest feelings from the urban hipsters of downtown DC who want to enjoy their urban playground. lol.