stealing time?
Are you serious? Stealing time?
?
There is no such thing in halacha. Time is not a monetary object that can be removed from it's owners possession.
Ever hear of a civil court accusing someone of stealing time?
Calling the police might be a shaileh of mesirah.
I wonder if you'd say that if someone was squating in your home... Ask your LOR but R Elyashiv told one of my שבעה קרובים it's not even a question and to go to law enforcement, and this was in E"Y with all the shailos of Dina Dmelachusa and the squatter could end up in jail.