This should be made with some caution, but can be very interesting. Example: railgun is often considered to be overpowered in some maps with large areas, thus a server admin may want to remove it, or to replace it with a different weapon. Another example may be disabling the grappling hook, to be more fair while playing against bots, that do not use it (or in case its behavior is broken in some old mod). First, let's examine how to remove items.