Nah, I let my new Uni friends call me by the wrong name for like a month before they found my Facebook and realised they had been saying it wrong. I just can't be assed correcting people any more, no one ever gets it right first time.
I make sure to spell it out immediately after telling anyone important/official what it is though, as even if they somehow hear me correctly there's about 5 spellings to the right pronunciation.
(Benjamin isn't my real name. My real name is too unique for me to want to share it.

)