The problem I present is that Jane doesn't want anyone to know because she doesn't want undesirables, such as coworkers or family, to know. It's not likely that someone will vindictively send pictures of Jane having what they, if they were at the party to take pictures in the first place, likely consider to be harmless fun. The problem is unintentional damage, which, as you say, is amplified by social media.

That said, the party example was weak. I opened with it because it was an easy example of oversight on the part of the user.