If you come across something saying "Eat me" or "Drink me", don't. You've got no idea what may be in these things. And the magical world has had problems before with greedy kids who down everything they come across. It is generally considered the White Rabbit got off lightly.
Remember none of us can help how we're made so no taking the mickey out of the "differently handsome". Trolls don't usually "do" humour unless it is to stuff the head of someone who offended them into a part of the body it was not meant to go into. They find that hilarious. You won't.