How many English players playing outside of England would get a start in a Premiership side, maybe 2 or 3? The vast number of English footballers playing abroad are in Scotland, Wales, Australia, USA, New Zealand etc. There's a very comprehensive list http://lesrosbifs.net/?page_id=15

EU regulations give EU citizens the right to work in other EU countries. How good would African football be if African footballers were prevented from playing abroad?

I totally agree with not playing National Anthems, but then I would be quite happy if National Anthems were universally banned from everything.