I was on holiday cycling and walking last week but I didn't want to publish my activities immediately and tell the world"I'm not at home, come break into my house".I could have recorded activities as 'private' and made them 'public' on my return but that's just too much faffing for my liking. So I started thinking about a new feature for this - holiday/away/stealth mode where activities don't go public until a specific date? An option to delay publishing by a fixed time when you complete the activity? A bit like an out-of-office setup.
I also started thinking about the difference between sharing with 'followers' and 'friends', they aren't really the same thing at all. If there was an option to classify contacts in those two categories it could further enhance personal security - I trust my friends, I don't know my followers in the same way. The above delayed publishing could publish to 'friends' until the specified date - this would allow for group holiday sharing until going public.