Most of the time i put all gas cans in a locked tool box but . I left them out over night and while getting ready to fill the mower on the job my guy seen white stuff all over one of the cans. So i dump it on another one and there must have been 10lbs of sugar in it . I most likely know who it was but what are ya gonna do good thing it wasn't in the mowers . Any one ever has and ****** do anything like this ? And do they make a gas lid the locks for mowers ???? Or some kind of strap to put over the hole tank and lock it up some how ??? Beside an enclosed ?