I can think of a few cases where the question is about [tag:reboot]s (reboot tests, post-patch power cycling, remote reboots/power-cycles/restarts).  
I can also argue convincingly that in each of those cases you're not really asking about the *reboot*, but rather all the things that lead up to it (pre-deployment testing, patching, and remote power control / out-of-band management).

So I agree - this tag can probably go.