you have got to treat your kit like everyone around you will steal it if you give them a chance. Nothing is safe at a paintball tournament. People always say that paintballers don't steal from each other, but that's bull sh@t. I delt with several thefts at Campaign Cup, and at least half of them were paintballers. Mostly small stuff, and almost all crimes of opportunity. Don't tempt other paintballers by leaving your shiny new kit laying about, assume that it will get knicked and lock it up accordingly. You wouldn't leave £1000 of cash sitting about so why leave your shiny marker sitting there for someone to be tempted with.
Trust me, i know about stolen kit, and you can be sure that i'm not leaving anything laying about this season.
No desponge, not every single paintballer is a theif; i did not say ALL paintballers are thiefs. But Some are, and if you give someone an opportunity, and long enough to think about it, you'll soon find your expensive new toys are missing.