Polite protocol? Off the top of my head, Democratic presidents have generally been very active post-presidency, at least during my lifetime. Well, except Kennedy. Republicans generally sit back on a beach earning 20%. Think about it:
Nixon: Went dark, for obvious reasons
Ford: Went dark
Carter: Active in building houses for the poor, writing books, and helping make the world a more peaceful place
Reagan: Went dark, but then, he had alzheimers.
Bush: Went dark
Clinton: Was briefly quiet, and then has worked (in a different way) to make the world a better place.
Bush II: Went dark
Like the way you twisted this, but hey, my fault, I should have been more specific... polite
political protocol.
As for your list, it is very biased and very incorrect, as I'm learning, should be expected...
I can't stand Carter as president or since, but yes, he has been involved in significant charity work. Good for him.
Clinton has clearly raised the most money... to be used for making the world a better place... but unfortunately, 90% of it goes for himself. Ya know, he truly believes 'charity begins at home'. Even his claimed charity donations... most ALL of it was paid to the Clinton foundation. $14M tax write-off so you can spend $12.5M on yourself, through the foundation. Don't ya just love the US tax code and how the rich can keep their money...
Bush II: Very, very dark on the political front, despite being said to be responsible for every single thing Obama can blame him for for 6+ years... but anything but dark on the charity front.
Airlift Research Foundation
Clinton Bush Haiti Fund
Kids Wish Network
National Park Foundation
Operation Smile
PeacePlayers International
Red Cross
Susan G. Komen for the Cure
The Salvation Army
...not to mention all that Laura Bush has been involved with.
but, I've said too much. You've made up your mind a long time ago, but please open it to some facts.
