im sure the thieves will know plenty of ways to get ur bumper off, they will be prepared for things to possibly being stuck on.
its a great idea to secure everything up, no doubt ab out that.
one thing to do possibly is secure or glue a plate on the back with your details. just incase it is stolen.
best thing to do just now, is not to park anywhere out of view as our cars are easy to target, bits are worth the money and are relitavly easy to take off.
and if you catch one in the middle of it give him/her a dam good hiding!!!!!
teach them not too touch an st!