I've been stupid lucky....(I heard that...that combination isn't all that uncommon...) Our pets have left the equipment alone.
'Course the Maggies' are upside down and suspended, since they are just too much of a temptation for our (presently) 2 cats....who've been given plenty of alternatives...which they enjoy.
Kids haven't been an issue, since we didn't go there.
I was tempted to suggest razor wire or electrified cattle wires, but Social Services of all stripes would come to get you....not to mention the ASPCA, or the neighbors considering you on a level with the Addams family....