I think most of you guys are approaching this from completely the wrong direction.
The decision to land always rests with the pilot
When a controller says "cleared to land", in Europe he means exactly that - the runway is clear. In the US he means " I reckon it'll be clear by the time you get to it after the other 3 aircraft". In either case if you, the Commander of the aircraft (allegedly) are not happy that the runway is safe to land on - Go Around.
A "land after" is also exactly what it says - the controller is unable to clear you, but if you think it's safe, well hey, it's your decision anyway.
As for different procedures in different countries, you could fill a book with those. So all this bleating about "it's dangerous" is just an excuse for not getting off your backside and making sure you know the procedures for where you're going.
BTW it's not new either, if anything I would say its use has declined dramatically over the last 25 years.