Now I do suspect that if you use an action with no cost
and no effect, that constitutes stalling. Specifically, I heard a ruling a while back saying that you can't use
Sam, FC to repeatedly try to play
Bill the Pony from your draw deck when you don't have
Bill the Pony in your draw deck (Elven telepathy decks used to do this for the free shuffle). Presumably, events are okay because they have the implicit cost of discarding the event (and thus can't be repeated
ad infinitum).
But as long as there's a cost of some sort, I don't think there's a problem.