The one that goes something like this: "Wealth doesn't make you a better or worse person, it only gives you the means to adequately display whichever you have been all along." Well, the same thing applies to social media. Those who make such comments are simply being given (or taking advantage of) an opportunity to show off who they really are inside. What makes it worse is that they don't seem to recognize several important aspect of their particular situation and some attributes of social media that apply to everyone:
1. The source is way too easy to trace. If you can't say it on stage in the Olympic stadium, don't tweet it!
2. Due to the nature of their status and position, everyone, their brothers and sisters, and their dogs are watching them. What makes them think (or not think) they can get away with something inappropriate? Hubris? Megalomania? Terminal rectalcraniumitis?
3. Unless they don't mind the world looking at them under a microscope, they should stay out of social media altogether. I know, I know, it's the "in" thing now to have the largest following. So with that many people examining their every post, you'd think these (otherwise) professional people would know to keep anything available to the public (or those who monitor their behavior for a reason) completely professional as well.

Alas, not so. There ain't no cure for stupid!