To clarify menu security, here's a simple example:

Suppose we have 4 users with the following levels and flags:

   ┌──────────────────────┬───────┬─────────┐
   │  Name                │ Level │  Flags  │
   │----------------------│-------│---------│
   │ Pete                 │   10  │    Z    │
   │ Jerry                │  100  │    P    │
   │ Al                   │  100  │    R    │
   │ Charlie              │  200  │  P & R  │
   └──────────────────────┴───────┴─────────┘

Let's define a menu with textlines only:

   ┌───────────────────────┬───────┬────────┐
   │ Text                  │ Level │ Flags  │
   │-----------------------│-------│--------│
   │ Good morning;         │   10  │        │
   │ ,;                    │   50  │        │
   │ Jerry                 │  100  │   P    │
   │ and;                  │  150  │        │
   │ Al;                   │  100  │   R    │
   │ send their best wishes│  200  │ P & R  │
   │ .                     │  300  │        │
   │ :-)                   │   10  │   X    │
   └───────────────────────┴───────┴────────┘

This would give the following result when the menu is displayed:

   ┌─────────────────┬─────────────────────────────────┐
   │ Pete            │ Good morning                    │
   ╞═════════════════╪═════════════════════════════════╡
   │ Jerry           │ Good morning,Jerry              │
   ╞═════════════════╪═════════════════════════════════╡
   │ Al              │ Good morning,Al                 │
   ╞═════════════════╪═════════════════════════════════╡
   │ Charlie         │ Good morning, Jerry             │
   │                 │ and Al send their best wishes   │
   └─────────────────┴─────────────────────────────────┘

The last 2 lines of the menu will NEVER be displayed, because none of the 4 users have the required level AND flags.