They do have culling in place for feral cats, and containment in most states for pets.

good way to compromise your system

https://www.makeuseof.com/why-you-shouldnt-copy-paste-commands-from-internet/

cam them, and ask them to add the imei to allow list ?

in first case it is pass by value. for list you are passing a reference.

https://www.geeksforgeeks.org/python/pass-by-reference-vs-value-in-python/