STAN JONES
Veteran
Lets be real here, there is noway the kings guard will do that because they know this kid has no courage and would lead the whole kingdom to its death, can he develop battle plans, make allies like his Tywin? No they would turn him in a moments notice.
Turn him in to who? Hes the fukking king

my favorite monologue from the whole series....this nikka jamie man
Does Jamie favor the god of light? "the night is DARK and full of terrors"
...Joffrey couldnt even kill Tyrion's midget ass but he gon go after the most powerful man in the seven kingdoms? The Hand runs this shyt dont get it twisted. U heard the Reins of Castamere my nikka? 

The KG aren't the Praetorian Guard, breh. The Mad King was just as bad as Joff's bullshyt yet the KG he had still protected him and fought on his behalf. Even Selmy was riding Joffrey until he was dismissed.
If Joff was smart about it Tywin could be deaded, all the Lannister army in KL don't mean shyt.