I was told, because I was at D2 about to take over a player D3 was on, that it shouldn't be done because you're setting a precedent. Will you contact everyone? Or, by telling the lower level your intentions, you were giving him an advantage over every D3 that WON'T hear from higher levels.
Conversely, by asking a higher level if they intended to pursue, you could be gaining an advantage if YOUR guy responds to you but ignores the other guy asking the same question.