The gamemode switcher (F3+F4) can be opened by anyone, though you still need the relevant permissions to actually change gamemode.
This is effectively harmless, but it'd be nice if it was disabled by default. Even if only to prevent other people experiencing the minor panic I felt when I was told by a player they could open the gamemode switcher, and sending me this screenshot >.>
Running VP version 0.3.1 on Fabric 1.21.1, with LuckPerms version 5.4.140