there is a work around every security device. If they really want it they will take it. all you can do is make harder for them to take it. I have that same lock on mine plus a regular lock on the latch and two tire claws with security lugs on each tire. In addition I also have the area where the trailer is located monitored by CCTV. With all this I am hoping they will move to an easier target.
The best option is tireboot like the ones used by the city but those are expensive.