Emergency disembarkation from transports, while able to fit within 3"

I had this come up in one of my games.

I had wrapped most of my opponents transport, but he was still able to fit within 3" with all models but in doing so I would be able to consolidate with my unit.

So the question is, are you allowed to place you model "poorly" to force an emergency disembark to get an extra 3" to the disembark?

We played with it that way, but it doesn't sit right with me. But as far as I can see, there isn't anything against it. I would guess it's the same thing as charging and "blocking yourself" from base contact.