I like to go for this skip when behind, and considering this game's moderation antics, there needs to be some kind of a mention in the rules that it is allowed.

Because the rules also redundantly say that

Save Hovering/Double Shot is allowed.

(Why wouldn't basic mechanics or glitches be allowed by default?)

I suggest to change that into

Save Hovering/Double Shot/Pause Buffering are allowed.

Reasoning: shooting through collision, including the Red Ball skip, is a natural byproduct of pause buffering.

Related thread: https://www.speedrun.com/iwbtboshy/forums/3al9e — The post on the bottom of page 1 shows clips of Anso successfully saving through a wall.

Video of the skip:

KomodoHype