////Suburban yards are often separated by fences that are 6 feet high.

I doubt that a deer will jump one even if he could.////

Not only can they jump over it, a big buck looking to assert himself will tear right through it just to do it. People don't seem to get that we're dealing with powerful, extremely fast creatures that can be utterly ferocious if they don't like you. You get hung up on a buck's antlers and you're goner.

A buddy of mine shot one through with a compound arrow and had to follow it for over two miles before it collapsed. How far do you think you could run if someone shot you all the way with an arrow? They're strong and they eat prodigious amounts.

////Deer in yer garden? Build a fence.

Build an electric one because if they're hungry enough, no other fence will stop them.