I honestly don't care if someone is drunk or on drugs when they play a show just as long as they know how to handle themselves while doing so. With that being said, I have never listened to this band nor do I ever plan to. This dude sounds like he needs some serious help.
You are wise for staying away from this band, trust me. For some reason my friend was like Bro you need to check this band out, So I was like meh, why not? I don't really care new bands could be fun to listen too. I listened to no exaggeration 13 seconds of a song and instantly turned off youtube and threw my headphones across the rooms and then prayed that my ears would forgive me.