Lyric discussion by onethousandnails 

Cover art for Scars lyrics by Moving Units

Sounds to me like the character is saying that if people want to hurt themselves, they can do what they want, he doesn't care because it's not him. He's saying if hurting yourself is what hurts, so be it. Everyone is just waiting for someone to actually kill themselves, hence "Waiting for somebodyelse". My opinion anyway.