That is definetely the best thing to do, but one must consider also that countries that have less than 10 users today might have much much more in the future, so it would be far easier to get those flags later on...
UPDATED STANDINGS (APRIL 10th 2008):1. VikWarriors (22828) (USA) - 33 flags1. Vitoria Shadow Pandas (24477) (BRASIL) - 33 flags3. Salisbury Auerbachs (22777) (USA) - 32 flags3. Wake Forest (22795) (USA) - 32 flags5. Vitoria Devils (24473) (BRASIL) - 30 flags6. globetrottel münchen (26154) (Germany) - 27 flags7. ESV Laim (26163) (Germany) - 26 flags7. The Tasmanian Eagles (38596) (AUSTRALIA) - 26 flags9. Zürich Blues (42147) (SWITZERLAND) - 25 flags9. Granada Stars (25841) (SPAIN) - 25 flags11. Walking Through This Door (22793) (USA) - 24 flags11. Ultra Nuggets (38980) (PORTUGAL) - 24 flags13. BBC Gembo Borgerhout (37360) (BELGIUM) - 23 flags14. Bruins (23229) (USA) - 22 flags14. Samantha Basket (46471) (ITALY) - 22 flags14. AS Barroom Heroes (36683) (ITALY) - 22 flags16. Asgaards Gudar (26617) (SWEDEN) - 21 Flags