^Thanks mogwai
Okay, so look at that. There are two "sweetspot" ranges I generally go for.
1) At the max horizontal range for the grab, but slightly above it (it's a circle, it goes farther out to the right at 0 degrees than it does at say, 45 degrees, obviously). This creates the illusion of being within grab range when you're not. Even if you're fighting someone like marth, who has better grab range, it still works because you can be above that part of it.
2) Be essentially "inside" of your opponent, though you don't have to go to that extreme. Rather than be at somewhere between approximately 15-75 degrees on the circle, you can go for 105-165. It's the equivalent range, but on the side of the circle closer to your opponent.
If you short hop *immediately* out of your shine, and you're already in the correct horizontal position, you can momentarily be right outside the range of their grabs. As soon as you're about to descend back into the range, you can use a down air/neutral air/whatever and it creates delayed aerial pressure. Assuming you achieve the right spacings, they can't grab you on the way up, and because you're delaying the aerial they can't grab you between the aerial and the shine either (This is all assuming you land the initial aerial-->shine on shield).
A direct counter to this is to immediate aerial OoS. However, when fighting someone like falcon (who iirc has a grab hitbox that's shifted horizontally towards falcon, more than most characters' grabs) you have a lot more room to abuse something like this. It can be done on anyone, but you might not want to risk it against a peach (who might nair OoS and completely shift momentum) as much as you would against a falcon. Either way, its useful vs all characters, and is NOT a matter of frame data.
Falco's pressure is NOT frame safe, I know this. If you have the right spacings you can cover the wholes in the frame data by putting yourself in ungrabbable areas when you are vulnerable.
After this post, I don't care what you say. Here's a picture, there's my argument, there you go. It's probably possible that there's maybe a stray frame or two where falco ends up in the grab range despite good spacing, and sorry if that's the case. I've been doing this for a while, and its worked on every single opponent I've fought, bar mistakes from my end. I've also seen mango do it for quite a while. Even if its IS somehow grabbable at certain times, its a small enough window that it is 100% worth the risk/reward.
It's obviously not always the ideal choice, but its often a good way to feel out your opponent, as well as a good go-to option against characters with less defensive options (like falcon).
