[indigoviolet]

The difficulty here is not in building software for a memorial page [although I'm sure there is a lot of room for experimentation and improvement], but in detecting that someone has passed away, and then handling all interactions relating to that user with extreme sensitivity.

[woodrow]

Legacy Locker, while solving a different problem (how do you transfer your online presence to your inheritors?), has a process to deal with this involving death certificates and trusted verifiers: http://legacylocker.com/features/verifiers

[indigoviolet]

Yeah, but on something like Facebook, people don't necessarily think of (or prioritize, given the other pressing issues in their lives) informing the site that someone has passed away.