Wear: Yes, bulletproof tires wear like regular tires (tread, sidewall, punctures) but withstand far more damage.
Legality (US): No federal ban. New York City prohibits them on non-armored vehicles. State/local laws vary.
Road Spikes: Can damage bulletproof tires. Standard spikes may not penetrate thick treads, but sidewall-puncturing spikes are more effective.
Check local laws and consult a tire specialist before installing.