We don’t need no steenkin’ fence. Nobody would dare come in here to do us harm. Forehead.....wall. Repeat.
A fence ain’t gonna stop ‘em. Not in Texas anyway. It might slow ‘em down a little bit, but they’ll go over, under, around or through it without too much delay.
If you meant an electrified fence with landmines, armed guards, and heavy air support, that might make a difference.