I have always thought a thief would just take the whole bag.
AFF Supporters can remove this and all advertisements
2) deter someone quickly placing "something" in my bag temporarily.
Would not call it an urban myth at all.Actually, I have tried the biro trick, it's no picnic to open the case. Urban myth kind of, at least as far as timing....
If you have enough practice:Indeed, I would think that required a bit more planning and experience with this sort of thing. Really not much can be done to prevent someone with a plan.
If you have enough practice:
Open A Locked Suitcase Without Leaving [much of] A Trace | Lifehacker Australia