> Your advice is to be selfish and not care what anybody thinks about you?

Well if one wants to be cynical that's how big fortunes and generally big advantages to self happen.

That is behaving selfishly and somehow manage to avoid repercussions.

Just two examples from stuff that is in the news these days:

1) The grift happened during the War on terror (especially 2001-2010) which somehow was never investigated

2) Members of the rock band "The Rolling Stones" . They cumulatively slept with thousands of married women and women in relationships. They all somehow managed to avoid the husbands and boyfriends looking for their wives. Most of them had homicidal intent against Mick Jagger and their unfaithful wife.

No, on the contrary. It's not very clear from my post, but I warn people not to expect any gratitude when they selflessly give their cookies away. And if you do share your cookies (which is a good thing!), be careful who you share it with. That's all.

Besides, the so called 'leaders' in this experiment were pretty selfish. Making all kinds of gross noises while eating their cookie. Did they care what somebody else thought of them?