I doubt this will happen, but I was curious as to what people thought. For 6x6 and 7x7, what if the following scramble technique was used: 1) Competitor is given a scramble sheet that contains the first portion of the scramble. Competitor scrambles the cube into that position and then it gets delivered to the scrambling table. 2) Scrambling table verifies the cube matches the picture for the first half of the scramble. The competitor should have already done this, so it shouldn't be an issue. 3) Once verified, the scrambling table applies an additional smaller scramble that is much easier to apply. I'm guessing at this point, something that simply pick the faces in a random order and then describes the the turns for each layer would be sufficient. So the example of a scramble applied afterwards would be: 3R' 2R2 R2 3F2 2F F' 3D 2D D2 3U2 2U' U2 3B 2B' B2 3L' 2L2 L. I'm guessing that should be sufficient to scramble a scrambled cube. Even if the competitor could figure it out backwards, they wouldn't be able to memorize the reverse of the scramble they were given. I know someone will say that we don't judge competitors on how well they can scramble. But 6x6x6 and 7x7x7 are difficult enough from an organization standpoint that having the option so that it can be held in more competitions is better.

Personally I think this is unnecessary. I think the easiest solution is to say that if you want to host 6 and 7 then make sure you will have someone that can competently scramble, and make sure you have the time, or else don't have 6 and 7. I don't think many people can complain with this as anyone who is good at 6 and 7 (and thus their opinion could be considered to be of importance) would understand the difficulties with hosting it.

It's not necessary, but it would be very helpful in some situations. Maybe there should be a provision in the regulations that different scrambling procedures can be used as long as approved by the WCA board before the competition, and as long as a fair, equally random scramble is still produced.