Players in buildmode can still damage NPCS.

Players in buildmode can still go to the spawn menu and spawn PVP weapons.

There is a exploit where if spawn protection is on, players can go into noclip and once spawn protection is off, they will not be kicked out of noclip.

PVP Players with spawn protection can still spawn props even if the option "PVP players cannot spawn props" is on.

Players in buildmode can still Prop Kill by using large props to crush PVP players.

PVP weapons will still show while in buildmode.

Buildmode weapons can still show while in PVP mode.

Buildmode weapons will sometimes not show if you die and respawn.