Naming conventions at the moment are controlled by agreements between countries and scientific bodies so that when stars and exo-planets are named they are given reasonable names, once non-scientists and others get out and start finding and naming planets and stars that's bound to change. Some examples of silly names have already been brought up, ordinary people sometimes do silly things just to relieve the boredom. There's in Indonesia (I doubt if that will get through the filters but oh well you get the idea), Bell End in England, Brown Willy in Cornwall, Port Circumcision in Antarctica, Happy Smashed in Buffalo Jump in the Rocky Mountains, Rectum in the Netherlands, Scratch My Rock in Cook islands (another one for the filter I am guessing), the list goes on. Not to have some silly names on celestial bodies would be immersion breaking because it would mean the entire universe is populated by robots with no sense of humour or vestige of humanity about them.
It's not immersion breaking, in fact i 's the exact opposite, it gives us the sense that the galaxy is populated by humans with all their foibles, quirks and tendencies to give amusing names to funny looking objects, obscene names to popular tourist attractions, and stupid names to towns, rivers and villages just because they can!
