I just want to say something: NOBODY CARES ABOUT QR CODES Yeah, I can go to tripl.com or whatever, also add your twitter/fb/G+ page otherwise you'll just look like some bozo stuck in Web 1.0 (contact by phone?!)
Do you not have a smartphone? They're a very common way to install apps. Heck, I sometimes scan QR codes right off my monitor.
No I will not install an app to install another app
Also, a QR code is opaque. What it will do? Open a page? Install what app? Compromise my cell phone with premium dialing sw?