In case anyone was interested, the "middle finger gesture" originated from the 100 Years War between France and England. Whenever the French captured English archers, they would chop off their middle fingers so they no longer could fire their bow and arrows. So whenever the French and English met, the English archers would show their middle finger as a taunt and to show the French that they still had them. After that though, the meaning has turned for the worst...
On SM Strikers, it was way too shallow. Not enough unlockables, and the cheats aren't even that great.