Well yep, back when I was young, and into yu-gi-oh... I went to a virginia convention.
We were all given 6 packs and build a half deck for the random tournament...
And couldnt trade till afterwards. Well I 5-0d and won the tournament, getting 15 more packs, which was pure awesomeness...
Anyways I was tradng around with a couple people, a big group around me, and a kid around my age, asked if he could see my cards...
I let him take a look at a stack, and later on during some other tournaments, noticed some cards where missing...
And in this convention the officials cant find who stole them, as anyone could own the cards themselves.. Then I noticed after the same kid saw my friend, who I took with me to the convention, was also missing cards...
And during the convention, we kept asking the kid, can we see your cards? and he always declined, as the officials were running around with nonsense, Josh and I had to take action, and we prepared to steal them back.
We finally got someone to get him to show them his cards, and he showed them to this kid before, and he (the kid seeing the stealers) said, Hey I didnt see these before...
He grabbed the stack, forgetting our cards, ran and left in a flash.
We got our things back, and yEAHHHHH!
Other then that, no one has stolen my things except my sister with my cameras T_T