So far my response has been sarcasm, humor and more sarcasm when no one gets my sense of humor....when I get angry now, I let more of it out (sarcastically) and it helps.....
Now granted I'm newly dx with MG but I've been dealing with the nightmare of clusterheadaches for 2+ years and finally realized I was allowing the pain of those nightmares to kill my sense of humor and it was changing / depressing me- the ability to look at the funny /ironic side of life always been an integral part of me... so I actively fought back and reclaimed my sense of humor instead of letting the clusters kill it and leave me with nothing but pain - I plan on doing the same with MG....
My advice:
if it helps to let it out and keeps you healthy (ier) and sane -find creative ways to do it (that don't get you arrested

)
if it helps to keep it in and "piece meal" it out in smaller tolerable increments - do that and tell those around you to the point : "This is the way I have to handle emotions for MY health - mental and physical. You may not understand it, but please accept I know what is best for ME in this respect...."