If you're a wireless customer, it goes without saying that being able to micromanage your usage is a great thing. It also goes without saying that if you're a wireless carrier, it's not. As many of us have found out the hard way, it doesn't take much overage to double your bill, and carriers rely on that exactly that kind of carelessness to make some extra coin month to month. We told you about MinuteWatcher not long ago, a nifty free service for keeping an eye on your calling and predict future usage based on trending, and apparently T-Mobile doesn't think much of it; in fact, besides blocking MinuteWatcher's servers, they've gone ahead and amended their terms of service to specifically prohibit such services. For a company typically known for showing its customers much love, T-Mobile's move doesn't show a lot of tact -- but then again, nothing speaks louder than the almighty overage minute.