Council parking Rangers and illegal parkers

I would imagine that many strata committees are looking forward with anticipation to the proposal that the government is considering to stop illegal parking in visitor car spaces and common property, That is, to allow the committee to report to parking officers a vehicle illegally parked and for council rangers to enter the property and take meaningful action, such as a fine.

I wonder if, in the meantime ,or if the proposal is rejected, if the following idea would work:

Triangular metal pop up bollards are installed at the entrances of visitor Parkin spaces.

If an outsiders car is illegally parked in the spot , a resident raises and locks the bollard.

A note with a committee members phone number is then placed on the windscreen

When the cars owner phones to get their car released, they are informed that the person with the key to do that is,say half an hour away and will come straight away if they are willing to pay the taxi fare to get them there quickly.

i can’t see any legal issues with this, but who knows?