mikhael

Undo within a limited short time window not a bad idea although maybe not a high priority.  I often accidentally upvote stuff as well.  Happens on reddit as well but you can simply undo your upvote at any time (not something i'd want)

It's easy to accidentally hit the lightning button. Losing one sat is pretty minor, but might put a little more distance between the icon and the title/comment, or give like a 10 second undo window