When I changed my old user name to current username the comments that address me by starting with @myoldname look silly and pointing to nobody. Shouldnt they by approriately updated as well ??
UPDATE: Thanks folks. I realize the technical non-feasibility of updating a simple text based pointing convention (such as the @name convention ) at such a large scale and with so many edge cases. But consider the process of code entry into the response box. There are simple ways for the system to recognize that its code and it colors it accordingly. Why cant the system (on a little hint by the commenter ) be able to do the same with the @name convention and unambiguously bind it to the intended user and persist it? That will make the automatic update very easy and error free.