By "pre moves" do you mean conditional moves?
If so, and if you used conditional moves in order to gain an edge in a time-controlled game (i.e., to cut down on the amount of time it took to make your moves so that you could win on time)...then yeah, I'd consider that cheating, or at the very least poor sportsmanship.
Here is the correspondence with one player.
(please don't repost private messages publicly - mod)