Here is a list of things Mlp should never do to Beerus. Which will result in Equestria getting destroyed XD.
1. Make Pinkie pie annoy Beerus, just like she did to Applejack.
2. Make Pinkie pie eat his cake.
3. Make Discord annoy Beerus, just like Pinkie pie.
4. Let Beerus meet Blueblood.
5. Scootaloo bragging about Rainbow dash being more awesome than Beerus, right in front of him.
6. Rarity, making a bad compliment about his manners, or his attire.
7. Twilight, asking him lots, and lots of questions.
8. Applejack giving smart remarks to Beerus.
9. Fluttershy giving Beerus the stare. (Or treating him like an animal).
10. Let Beerus spend a day with the Cmc.
11. Make Rainbow dash throw a prank on him.
12. Pinkie pie giving Beerus stupid or annoying nicknames.
13. Do a prank on Applejack, and then put the blame on Beerus.
14. Show him this list.
15. (Warning! Never, ever, do this one, if you have the guts.) Write a fimfiction, where all of the above happens.