I can see why people would be less angry at Google for doing it than Microsoft given the differences in circumstance.
I can't. Most people don't that use custom ROMs, don't do it for the cool factor, but because there are things they want to do with their phone that otherwise can't because the crippled capabilities of Android/OEMs, or because they want an uniform experience across devices.
Locking the firmware ( with no way to disable this lock ) would enrage me (and a lot of people).
Uncertain fortune is thoroughly mastered by the equity of the calculation. - Blaise Pascal