Not only is it the longest border in the entire world (including Alaska, it's 9,000 kilometers long)... Yes, we go big here!
![Laugh :laugh:](https://thebluecashew.net/Smileys/tbcsmiles/laugh.gif)
It's more or less open, in that there are no physical barriers in place.
Historically this was simply never a problem. Most Whites stay on the side that they belong on, all on their own.