Europe being as it is, it really should not come as that much of a surprise that the border between Sweden and Norway is less of a border and more of a symbolic line that you can take neat photos of and upload to Instagram. Seriously, just look at this border: it isn't stopping anyone trying to cross. It's doing the exact opposite - it's inviting people to cross it.
But that's just the way Europe is, due to the European Union and global politics and whatnot. That's just what makes Europe so incredibly cool - you can pretty much go anywhere.