Seriously?Do something else instead. Seriously.
Being an ambassador to the game that you enjoy does take a little bit of effort. The effort required is well worth the investment when you see new players started out on the right foot. Demonstrating care for the equipment is a good place to start. This should be done whether you play off the wall or bring your own. This extends to all equipment and not just cues.
Playing with your friends is an opportunity for you to show them what you enjoy about the game. So showing and explaining why you have personal cues is not that big a task. Sharing is not required. If they are true neophytes they probably would prefer to play off the wall after you explain the care and feeding of a $1200 cue.:grin: