I admit to not having fully investigated these cables, but can't they be cut or sawn through using the simplest of tools? What's the point? If they've already gained access to your hotel room what's to prevent them from hacking the cable and lifting your notebook? Insurance is fine and dandy but it won't pay more than 50% of the value of your PC. If you cannot take your PC with you, or secure it on the hotel premises, then at least remove the HDD, and take it with you, and try as best you can to hide the PC in your room. Between the mattress and box-spring sometimes works. Just remember it's there prior to any vigorous mattress activities.

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It's to stop the opportunistic thief. Unless they know that you have a cable, they are unlikely to be carrying round a large set of bolt cutters with them.

It's 'see-grab-run'.

Besides, being caught with a 2 foot long pair of bolt cutters in someone's hotel room is not going to give much credence to your claims of innocence.

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Don't need 2ft bolt cutters to snap a laptop leash - a pair of tinsnips will easily do that.

Don't need 2ft bolt cutters to snap a laptop leash - a pair of tinsnips will easily do that. 

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Still need a pair of tinsnips though - how many maids/bargirls/hall porters will be carrying those?