Here’s something that I don’t understand. Twenty five years ago, people would not have volunteered to enter a lot of their private information into an easily accessible public space, but you could have taken their photo without their permission without much of a problem. Today, it’s the other way around: While people share more and more of their sometimes most private information with total strangers online, they’ll get very angry if you take their photo without their permission. The only explanation I can come up with is that it’s about control: Today’s situation corresponds to people having more control over what they want other people to see (even if it makes very little, if any sense, to share as much information as some people do; and one can probably argue about whether it’s really more control). However, if that is true the privacy argument about having one’s photo taken disappears - how inconvenient! In any case, this is an interesting development, isn’t it?