Here is an image of the edge of the shelf in 1997. This is no where near large enough to be an "ice wall".
I ask again: Where are your "guards?"
Let me lay this out for you in sort of a wet blanket way:
RE: “Show me a picture of the ‘ice wall’."
FE: “Here’s one.”
RE: “But that’s just the blah, blah, blah ice shelf.”
FE: “No, that’s Greenland you’re thinking of.”
RE: “No it’s not, it’s right near X station, here’s a picture…Of Antartica.”
FE: “No, that’s Greenland, no one is allowed to go to Antartica.”
RE: "Says who?”
FE: “It’s part of the conspiracy, you’re not allowed to go there and see what’s on the other side.”
RE: "What’s stopping me, where are the guards?”
FE: “Nothing really other than the fact that you’re not allowed to go there and it’s quite inhospitiable and no one has ever been there.”
RE: “But they have, there’s X expedition and Y expedition…”
FE: “That’s all fake, part of the conspiracy and you have not been there, so you don’t know.”
Thread dies out of exasperation and/or boredom.
2 months later:
New RE: “Show me a picture of the ‘ice wall’.”
Rinse & Repeat.
Ice wall business is a tough place start. Trust me, I know, I started there. You need something that you can somewhat empirically back up, with extremely precise, trusted data. And even then, there are catchall FE defenses, e.g., the conspiracy, modern math, astronomy, physics are a fallacy, etc. Personally, I think the Sun is a good place to start. Approx. 7 billion of us see it every day, so it’s ready made for discussing how it appears (and disappears) and moves about at different times of the year on a flat or round earth.