Easy Way to see Other People's Islands?

Okay, I have a pretty big island. I really want to show it off to people, but without inviting them. The way I think it should work is...

1.You have a choice to make your island a warp (Or something)
2.When someone visits your island, they are in adventure mode, and can't break blocks.
3. You can kick people from viewing your island (If they are annoying you)
4.Yeah. That's about it.

Anyway, this is probably very hard to construct, and it's probably me dreaming. But it woukd be cool to have something around these lines, anyway.

Thanks For Reading