Perhaps you should give people more credit for possession of intelligence. The majority of people in general know that Thai Kick Boxing is a respected martial art and the kind of people who shall hopefully be reading your CV are most likely to be in possession of an intelligence greater than your average Sun reader so I would say go for it. Someone who can handle themselves would be an asset considering the increased risk of terrorism - that's my thinking anyway.
However, my view counts for 'Jack' in the grand scheme of things.
VFE.