Why deal with them at all if they bother you?
Each of us gets to choose our own friends, lovers, and spouse.
All relationships are at will. You get to choose who you spend your time with and if you are forced to be in a room with someone you have the option to either ignore that person and focus on why you are there or choose not to allow yourself to emotional invested in their behavior.
Maybe you should take a page from them and (not care) about them! :-)