Not a strava employee, but under https://www.strava.com/settings/privacy https://www.strava.com/settings/privacy There is a setting to disable your activity dat

Not a strava employee, but under https://www.strava.com/settings/privacy https://www.strava.com/settings/privacy There is a setting to disable your activity data from being incorporated into the heatmaps, which I would assume (hopefully) is retroactive at some point - not sure how frequently those maps are regenerated