A little harsh coming from someone who probably hasn't had to pay full price for case of paint in years. If you want to change people's mind you need to appeal to their reason not be bag on them.
Support your local paintball stores because if you don't they will disappear and you'll be forced to buy from Walmart. That would suck. Remember that most fields are affiliated with stores so if the stores go out of business so will many fields. Then you will have no where to play either.