Climbing on opponent to gain greater height

[hoopguy]

Rule 10-4-D climbing on or lifting teamate to gain greater height.
Penalty - player technical.

I called this once during a jr high rec league end-of-year all star game. One kid got on his hand and knees and the other kid stepped on him and then dunked. I blew the whistle for a T and the heads of league jumped in too and yelled at the kids. It was actually kind of funny. I ended up just giving one T but after seeing a post on here I think I should have T'd up both kids(in that example) but for the event it was fine.

My post concerns the a potential glitch in a player gaining an advantage.

Situation is; A1 is shooting behind A2 screen. B2 jumps and uses his left hand on A2s shoulder to jump extra high and block A1's shot. I believe by rule all we have is a common foul on b2 against a2. This does not seem extreme enough in this instance. Also, this is a very hard call to see, especially in two person. The on ball official should be focused on the airborne shooter and may have trouble seeing the left hand of the defender and the off ball official should be looking elsewhere. I know there is no extra penalty for tricking an official but it makes it feel more severe(think soccer).

Is my ruling accurate? If so do you think the rule should be changed so that this would also be a player technical or leave alone?