List is for system administrators, software developers, and principal investigators that are responsible for Galaxy servers that are publicly accessible.  By "publicly accessible" we mean that anyone on the web can create an account, upload data, and perform analyses on the server.  It does not mean that there are no limits on the server.  The list is used mainly to communicate security concerns a day or two before public announcements.  Anyone associated with any server that is listed on the Public Galaxy Servers or Galaxy Services pages is eligible and encouraged to be on this list. 

Hint for those too lazy to click: only you know useful information about the problem context such as the software packages and versions involved.  A good question includes the bare minimum context detail, allowing someone who is skilled in the art and reading the list to understand the problem.