...which means that a lot of the times you're programming yourself to perform a technique under unsuitable circumstances.
When I'm in this situation I shut down the 'training' part of my brain and don't come back after the class is over. It usually results in me falling down a lot for the other guy and going through the motions when I'm tori.
In my opinion, training yourself to act inappropriately is suicide.
Picture this scenario - the newer guy interprets your assertiveness as non-purposeful aggression on your part, and either chickens out or tries to step up to the challenge with an added dosage of strength and hostility. I've seen both happen plenty of times.
When I say using intention with newer students - I talking about specifically a very slo-mo attack. If they don't move they will feel my attack, but it will be no more than a very gentle 'push' (for lack of a better word). I use this as an opportunity to really, really focus on and train the 'structure' of my kamae while moving slowly. The way I train this it's actually very difficult for me to do (hard to explain in words though).
So, it's good training to me as well as my partner. In fact, I won't do anything that isn't good training for both people. In a two hour class, training well for half and poorly for half means I just should have went running instead!