Is your problem with new pros that never log on Strava joining simply because there's no races? Lots of pros are already on Strava, post all their training, and regularly take CRs (sometimes fully admitting to CR hunting because they felt like it). Just because there's an increase in segment hunting is no reason to pout about it and lock leaderboards. Maybe you should ask them to stop people from signing up for Strava. Good luck with that