[quote name='n8rockerasu']I'm sorry, BV, I have to do this...[/QUOTE]
You don't really at all, but it's fine.
Defensive players are allowed to be in motion at the snap in the NFL, it's only the offense which has to be stationary (only one offensive player can move at a time once the QB is under center IIRC). You see defenders trying to time the snap count all the time. Guys obviously don't move laterally like I do, but they certainly fake in and out towards the line all the time. You're right that somebody already in motion is going to be moving faster than somebody who is stationary, but that's not an exploit, it's just physics.
There's a difference between what I do, which is manually moving one linebacker, and shaking the entire set back and forth continuously, which is known as shake blitzing, and is considered a form of nano blitzing. The AI isn't capable of blocking that, which is why it's banned, my motion of the linebacker doesn't provide the same advantage. I've seen both in action, they're not comparable, we already discussed the differences between them months ago.
As for the kickoff return, my recollection of the rule was only that you couldn't run out the back of the endzone and then forward, which is what people were doing. I don't think we ever said that the returner had to be completely stationary, after all shorter kicks are often fielded in stride automatically. Returners field kicks in stride all the time in the NFL.