Last year, I got a phone call and e-mail from AT&T stating that if I didn't stop using my phone for tethering, I would be automatically "upgraded" to a DataPro 4GB data plan, which would override my "unlimited data" plan.
The issue with this is, I was using my Android phone as a hotspot, and I was using it to watch videos from MSDN for work purposes because funny enough, AT&T's 3G network was faster than my work internet connection.
My concern is, with phones and tablets blurring a line between mobile computers and desktop computers (with docks included), if the next phone I get in a few years comes with the ability to dock my phone to use a full desktop, is that going to count as tethering? Is "desktop mode" data plan going to be different than a "mobile mode" data plan? Will I be forced to finally give up my "unlimited data" plan on my phone?
AT&T has tried numerous times to get rid of my data plan, and I know one of these days I'm going to get a bill and it's going to be gone, and I'll call AT&T and ask what is going on and they will just say "We don't offer that plan anymore, so you were moved to the most appropriate plan" just like they tried to do years ago.
I could see since I am a "unlimited data" plan user, they could implement this six strikes plan, and use it any chance they can find until the inevitable happens.