I have, but for taping my knee. I didn't find it as helpful as I had hoped and the tape tended to try to curl and peel up when putting on tights (and without tights and just wearing pants, same problem, it starts to curl up and come off, at which point it's all but useless)... it became more of a hassle to try to use it than to just seek another alternative. It works better on my knee when it's uncovered in my experience.
It might work out better on an ankle, but in that situation, I'd probably be more inclined to use traditional athletic tape. The thing about KT tape compared to athletic tape is that it's stretchy and elastic, which is good for joints and muscles that need support that isn't possible with athletic tape because it's so restrictive that you lose quite a bit of your range of motion (which is also a benefit of athletic tape, when it's needed)... but that's not as much of an issue on the feet in skates where you range of motion is already restricted. Basically I can't see that there would be as much benefit to KT tape over athletic tape in skates... because you really won't utilize most of the advantages.