If you're going to b*tch about how hard done by chelsea are, learn the rules. According to Fifa, there are 7 actions in football that can land you a caution, standing in front of a free kick violates 2 of them. Here's a little snippit to re-jog your memory Idiotic:
4. delays the restart of play
5. fails to respect the required distance when play is restarted with a corner kick, free kick or throw-in.
Also Idiotic, we we're awarded a free-kick, not a penalty, so your team had ample opportunity to defend the free kick, which they failed to do. United deserved a point and they rightly got it. Deal with it and move on.