Personally I've never said no aside from the one time my friend was walking away from me and I would have lost her if I hadn't run to catch up.
But I also have a question. I happened to be at Katsucon this weekend and me and a friend were cosplaying Stocking and Scanty. We were just talking near a balcony with a sitting room behind us. A few people were inside the sitting room and apparently one of the guys on the floor was filming me and my friend for a good 5 min. A man came up and told us but as he was doing so the guy filming us booked.
What would you guys do in that situation? I thought it was fairly harmless even if it was creepy and rude.
I'm Peche Cosplay on Facebook!