I prevent escape or intrusion,
Yet I also preserve and protect,
Thieves use me to get money,
From me they can often collect.
I’m the practice of a sport, but not on the lawn,
Your friends may get upset when I’m sat upon.
What am I?
Fence. Fences keep ne’er-do-wells out and protect people inside. A fence is a person who buys stolen goods to later resell them for a profit. Those who fence practice the sport of fencing. En garde! And people don’t like it when you sit on the fence in a heated debate. (Believe me, I speak from experience)