Hardcore Dilema

Alright, I started a small BYW fed w/ my brothers and some friends. But I have a major problem, I want to do some hardcore deathmatch style stuff, but they're afraid. I already said it would just be like thumb tacks and barbedwire, no glass razorblades or fire, but they refuse. They've said they'll use fake barbedwire but I still want it to be more extreme. Can you think of any way to convince them