Just don't...
I'm not the type that generally judges someone by what they drive or what they wear. They say you can tell much about a person by the way they treat their dog or by the length of their hair. That may be so in some cases but I don't put much stock in wholesale assumptions about people.
What will make me mean and grumpy and cause a snap conclusion without a second thought is obvious signs of total disregard for the most basic of safety considerations. Forget the fact that you are defacing a classic piece of paintball iron - someone who cuts off a trigger guard is just plain arrogant and dumb.