I live in a block of flats. I bought a parking space when I got my flat. I don't have a car but friends use my space fairly regularly (not this weekend though).
I've just popped out and have noticed someone is in my space.
It is a stack parking system though and you need a key to bring the space back down to ground level to get the car out. WIBU to lock the car into an undriveable position.....
Part of me thinks IWBU to do that as it could just be a visitor who has made a mistake or a new tenant (but you need a key fob to get into the private car park) and it isn't really fair to do it without telling them who to approach to get the car out and I don't want an angry person at my door at some point overnight.
The spaces aren't marked but you only get a fob if own one/ rent a property with one so whoever let them in should know that it isn't their space.
People do sometimes use one anothers spaces but the convention is we put a note on the car saying who it belongs to and how to contact them.
This car has no note.