Just for the record: Yes, I do foul. No I do not do it to kill your stars. I only do it if I can thereby gain a strategic advantage. Meaning a) Getting your claw/rsc/frenzy/whatever player badly hurt or even just ko'd. Or b) removing a fallen player from a square that I need to pass through in order to avoid tacklezones.
Apart from that, I am a very peaceloving ballplaying coach.