They won't judge you, but your health insurance rate might go up for
unspecific reasons.
See, most comments here are a bit on the side of So what? Who cares?, but fitness data is health data and health data is considered extra sensitive. And I guess rightly so, because of this: http://www.tearsheet.co/data/allstate-is-watching-you-how-th...
My prediction is that most health-related apps will be regulated in the near future. It's already happening with the GDPR to some extend, which classifies health data as sensitive requiring extra protection (and extra consent from users).
A breach like that (if fitness data was leaked) could result in heavy fines under GDPR (or something like the Medical Device Regulation, which is starting to extend to medical/health apps), if it becomes clear that the company didn't take security seriously enough.