This comment is a bit old now, but I want to clarify some things that I completely skittered over and just didn't explain adequately. It isn't a case of "not c

This comment is a bit old now, but I want to clarify some things that I completely skittered over and just didn't explain adequately. It isn't a case of "not clicking on someone else's link", it's a case of never receiving someone else's link. As it is, clueless people will forward their links in attempts to let others read their messages. Of course this won't work (I don't expect so anyway). But, if person A and person B both receive the same short code, which would (obviously/presumably, in such a scheme) unlock different messages for both, that would be a very confusing user experience. Given the "enterprise security" standpoint this (somewhat) confusing feature seems to be marketed toward, I can see this being the exact kind of situation that enterprises would never want happening (the resulting executive paranoia would undermine the perceived security of the system). And so this folds into the global social graph thing I was talking about.