I took it upon myself to email the FA and ask why Joe Hart was not given the boot after using the heed (incident involving Hull City’s George Boyd) last week and this is their reply;
Dear Mr McKenna
Thank you for contacting the Football Association.
With regards to the incident you refer to, where the match officials have seen an incident it is considered to have been ‘refereed’ and therefore no retrospective action can be taken except for a case of exceptional circumstance.
As a result, there is no requirement to review the incident, again, unless it is an exceptional incident.
The FA is only able to take any retrospective action on incidents not seen by the Match Officials which occur on the field of play and fall within Law 12 [serious foul play, violent conduct, spitting at an opponent or any other person, offensive, insulting or abusive language or gestures].
The FA may charge a player for committing an offence on the field of play within Law 12, not seen by Match Officials, but caught on video.
Simon Bower | Customer Relations
The Football Association
Wembley Stadium, Wembley, London, HA9 0WS
So there you have it, it all boils down to the referee doing FA about Hart.
So the FA pass the buck and Hart gets away with it.