I had the one from "can't steal it" also. Thieves can steal anything but I felt better having the wheel boot on. It was also a selling feature when I sold the trailer.

Another thing about trailer security, I try to NEVER take the whole rig to a hotel. If you do, or if you attend a weekend long event..... ALWAYS separate your truck from your trailer, use your tongue lock and your wheel boot, and block your trailer with another vehicle whenever possible.