Every time you meet someone with a costume similar to yours in a place that's unlikely to be recorded, trade a piece of outer gear so anyone analyzing the footage will have a harder time following individual movements. If my key distinguishing feature was a helmet with a blaster scorch mark across the top, have fun tracking that once it's been exchanged half a dozen times throughout the evening.

Put a pebble in your shoe. Sometimes have it in your other shoe. Sometimes have it in your pocket. Inconsistent gait can make it harder to identify and follow an individual across different videos.

Leave your phone/smart watch/bluetooth vibrator at home.