Con_Printf hook could be useful to get some console lines for doing things, like:

1. Get FPS from server and show it for players whenever you want: https://forums.alliedmods.net/showthread.php?t=166291
2. Get when a player is overflowing server and kick him by name: Crash with SZ_GetSpace overflow on (Nick) ReHLDS#855
3. Blocking some Con_Printf to be displayed at server console? So, that means less server logs file weight and less distractions searching for something.
4. Other possibilites I don't know.