plant vines on the wires if they are bothering anyone. no fences are not perfect and won’t prevent criminals who have no respect for our law and refuse to follow the procedure to enter. but neither do apartment gates. however, it slows them down as do apartement gates. it allows time for border guards to do something and also to be alerted if drug lords and the mexican army and police cross the line shooting. it is better than nothing. and for some illegal aliens, the mere site of the fence may deter them from entering since it is what is used at prisons.
Poison ivy or oak may be good for starters.