Thing is I find booing fun but not when it's someone booing their own national hero.
For example the DC atmospheres like South America, Chileans throwing stuff at Zabaleta (who I liked) that was awesome. That's hostility. Come to our town and we'll give you the welcome you deserve etc.
But to boo your own, nah I'm out.
Booing is depicable whoever you are directing it at. No excuses.
If someone sits by me and boos a player or a singer or whoever, I will usually tell him to stfu. It's such an utter lack of respect for another human being, it doesn't matter if he's your worst rival. There are some exceptions though... like when a politician is booed or the cops or the king of spain.