On SMP, no visual xrays or hacks are allowed.
All mods except OptiFine, Sodium, Iris, Patcher and Starlight are use at your own risk. The only exception to this is on-its-own Baritone.
BedWars and Bridge are fun-packed gamemodes for the more competitive people in the community.
The Network is usually up 24/7, but obviously crashes or maintenance or not ruled out.