[JoeSmithson]

> "What's stopping some jackass in cosplay from pulling the same stunt?"

The ultimate answer to this is; potentially being prosecuted for kidnap and impersonating police.

Most police powers boil down to exclusive legal defences that non-police can't use.

[jacobush]

So, if you are right wing bent on kidnapping, all you have to do is join the police. Seems to be working pretty well.