There may be other examples of how to abuse it as well (none that I can think of atm, but I'm sure there is). While screen caps are useful its not always possible to get them because some people don't think to save screenshots for later use when crap like that happens. Its nice to see that kind of community policing and investigation, but it seems much easier for the staff to just have a copy of the content and a timestamp.

However, there are other ways they could handle that kind of scenario, and my idea is just merely one of them.