the offside rule

wouldn’t it be interesting if, in order to play for a team such as Liverpool, say, or Chelsea, the rules were (indulge me – I inhabit a different planet from this) that you had to have been born and brought up either in the city or district from which the team took its name?
yesterday’s match between Arsenal and Real Madrid had only two Englishmen in it, let alone natives of either Madrid or Highbury, and they were both playing for the Spanish team. Hola.