Here is an option to disallow the menu bars items or insert/delete
you could put this in you in an auto_open module then as soon as the
spreadsheet opens these menu items are greyed out. I added delete
incase you need it too


Application.CommandBars("Cell").Reset
Application.CommandBars("Row").Reset
Application.CommandBars(1).Reset
Dim Ctrl As Office.CommandBarControl
For Each Ctrl In Application.CommandBars.FindControls(ID:=296) 'insert
from menu bar
Ctrl.Enabled = False
Next Ctrl
For Each Ctrl In Application.CommandBars.FindControls(ID:=478) ' delete
from menu bar
Ctrl.Enabled = False
Next Ctrl
Application.CommandBars("Row").FindControl(ID:=293 ).Enabled = False '
Delete from Row
Application.CommandBars("Row").FindControl(ID:=296 ).Enabled = False '
Insert From row
Application.CommandBars("Cell").FindControl(ID:=29 2).Enabled = False '
Insert from cell
Application.CommandBars("Cell").FindControl(ID:=29 5).Enabled = False '
Delete from cell