I realise I will offend all you double barrellers
But why?
Do you realise it's a mouthful and makes you look like you're trying to be some kind of lord or lady?
What's wrong with one surname?
When I marry my OH i'lol take his surname. I won't just add it to mine and cause an unnecessarly long name to have to say/write/spell.
I think they make you look like a pleb.