I called the guy's manager to complain about his practices (thinking he was just doing it to get commission) but she apparently supports it so I bitched her dumb ass out.
So, if you're a VoiceStream customer I encourage you to spam him back:
http://www.voicestream.com/messagecenter/
2067785959
His name's Kyle Wright.
Be sure to tell him how you hate being interrupted with spam from a company you're already giving money to.