[masraum]

If the stoppers had some sort of moral omniscience that kept it from being used for robbery or date rape. Assuming it would only affect people who were in the act of commiting some sort of crime, assuming that it was terribly unrealistic, but awesome at the same time, then sure, lets get stoppers. Hell, give them to kids so they can defend themselves against bullies.

Since a stopper as described, without being imbued with some sort of god-like power could be used for bad purposes similar to a gun by those with less than honest/moral intentions, then I don't know. In that case, a gun would probably actually be better.