I don't believe for a minute the victim-blaming nonsense that people somehow authorized this. My spouse and I have both started getting crap like this delivered to our phones at different times, and neither of us has ever downloaded ringtones or wallpapers for our phones, or anything else like that. These people are spammers. Spammers lie. Spammers ALWAYS lie. They claim you authorized stuff, and they'll happily offer made-up proof. (I once had a spammer claim that a signup occurred from a particular IP address. That address was a laser printer.) So no, it's not the case that everyone who gets one of these signed up without noticing.