the labels would be

• [old] as serverlabel that masterserver or the game sets for servers that run an old incompatible version
• [hidden] as serverlabel or serversnames that start with this tag for servers that should not be displayed for casual players, like tests servers, alphas or servers that lightly break rules but not enough to justify banning

servers with this labels would be hidden in the serverlist by default with a button to display them and switch the default behavior