It’s why the Zwiftpower “alias” feature is so good. It tracks any changes in weight/height between races. Pretty obvious when someone drops 10kg for a race.
We are of course back to the question of how far Zwift are prepared to engage with racing protocols/sanctions of its own members. It’s a tricky one, as Eric has discussed with his usual erudition and balance on weight cat enforcement, and is covered regularly by Simon and the boys on the Zwiftcast.
For what it’s worth, I worry about what’s in my control and not what isn’t. I know cheats mess up bunches/pacing etc but I can’t stop them.
Simplistic I know, but saves stress creeping into the one thing I do to relieve it!