Crippling cars is not the solution to that problem, making better alternatives usable is.

Alright but think about that for a minute here. The trolley is in a parking space... Because someone was loading the shopping in to their car and just left the trolley there inconsiderately. So like, they drove their car to the shops and did that. You could maybe add this to the list of measures to encourage alternative means of transport, but it's certainly a funny way to go about it, sort of like just going out and driving so badly that it's impossible for anyone else to be on the roads with you. Bit of a slash and burn approach, certainly morally compromised. Maybe it'd be for the greater good in some infinitesimally small way but I think it'd be hard for people to see it as particularly heroic more than what is more aptly describable as being an asshole.