Yes, playing paintball without using proper accessories like masks and overalls can be highly dangerous. The reason is that without the mask, the paintball can enter your eyes and damage them forever. However, like all other sports, a paintball game will be great fun if you take preventive measures. One suggestion here is to go for the products that come with the safety certifications. For example, you can opt for Maddog JT Stealth Semi-Automatic .68 Caliber Protective Paintball Gun.