You can't really easily remove the OBD port but you can get 'lock' devices that are designed to prevent easy access to it.
In most cars it's generally just behind a small piece of removable plastic.
Arrgh right I thought it was be easier.
I'm not really a car guy I love them and know basic servicing but that's about it. I think my most extravagant mechanics was swapping cams following a guide on my first car.
