The whole enterprise is a little tasteless with a chance of worse. Not some substacker or tweeter speculating in itself - people are obviously free to let their speculation flag fly. But you start amplifying this stuff on an open internet messageboard and next thing you know, it's reddit 'found' the Boston bomber. The local downsides outweigh the gawking value and I say this as a dyed-in-the-wool internet gawker.