My personal policy at work is a super strict seperation, I simply share as little as possible, standard small talk but I keep it extremely generic. Say too little people get curious, say too much people draw conclusions or feel the emergence of a relationship. Be just uninteresting enough to be overlooked in social contexts.

Not sure it would have helped in his case as both his job and hobby are public. But it has kept drama at bay in my case and has served me well but ymmv.