Do any of you bother with these? We finally got round to buying some for our last trip (usually don't bother with any locks at all) only to find when we collected our bags at LHR that our bags had been searched and they had kept the locks and also hadn't zipped the bags up properly so - joy of joys, my bright red underwear was hanging out through the zip 
Is this a common occurrence or not i.e. should I buy new locks or simply not bother again?
Inetrestingly I am not aware of our bags having been searched before so I wonder if the presence of the locks makes them more likely to want to search your bags?

Is this a common occurrence or not i.e. should I buy new locks or simply not bother again?
Inetrestingly I am not aware of our bags having been searched before so I wonder if the presence of the locks makes them more likely to want to search your bags?