You can rationalize a DOS attack any way you want. It still prevents valid users from using their phones. If you're lucky, you'll just prevent some frat boys from ordering some pizza. If you're not, you'll stop a call from a daughter calling dad to pick her up because her boyfriend is a bit buzzed, resulting in a disfiguring accident and a few calls to 911, resulting just a few deaths. Still a go?
Actions have consequences. Are you willing to have hurt, just to prove a (fairly minor) point.