Filler? I don't even know 'er! aka the fuck-Bleach [SPOILERS] megathread!

[Sithdarth]

So Tsukishima makes it so that he didn't break a law.

I'm pretty sure that would be the kind of change that would be so obvious that the person would be able to break it. Kind of like Orihime and Chad were starting to do. There does seem to be limits on what he can do. If he goes to far it can be resisted and the results of the resisting seems to depend on how strong the will of the person is.

Which makes me think of something else. Perhaps Byakuya's will is so strong and he is so focused on what is going on now that any attempt to modify his history like that would auto fail.

What I dont get is why Byakuya doesn't know this. He inserted himself into his past so shouldn't Byakuya have memories of hanging out with him? Why the explanation?

I think part of the ability is that he has to talk to them. Cutting is the way in but it doesn't activate until he says something and wills it to happen.