If you're a user of a GPS logging site like Garmin Connect, MapMyRide, Endomondo etc. then you may want to check and consider changing your privacy settings.
Garmin for example have default privacy set to 'share' so that means any ride you upload is publicly searchable and visible to anyone. A quick look in my local area searching under 'cycling' and the word 'home' showed up loads of tracks called things like "ride home from work", "training loop from home" which basically amount to a location where a bike is kept.
