Just you try singing "You love us for our money" just try!
Or "Raise tacks, sheets & mainsail haul" or any other version of chorus that aint been "folkied". You're on a loser for sure.
Being real polite, I always wait till the shantyman has sung HIS chorus before I drown him out with mine, but others aint as courteous as meself ;-) (I do sometimes sing my own version anyway, just to drive folks nuts)