Will the person be able to see when I replay their public snap?

You need an event item, which you can only get though the most dishonest thing, hacking.

This means that you need to either reset the cartridge, or update your Action Replay to the latest firmware- both of which can be done by connecting the AR to...

Action replay is a cheat system sold separately. You can visit their site to purchase one and you basically enter codes into the action replay which cause changes in the...

Make sure that it is not a collaborative playlist. For some reason it doesn't let you make a collaborative playlist public.

Unfortunately, Snapchat only lets you replay a Snap one time after you've opened it.

On a private a snap, yes. But if it is a story, then that person won't be able to see it.

Have something that covers your hands, like a jacket, so no one notices, or go into a less populated area of wherever you are.