Last bettor mucking in MTTs

[betgo]

Played the $5K at Turning Stone. I noticed that the last bettor would usually muck a complete bluff rather than turning it over. I sometimes asked them to show. Sometimes people would throw their cards so they were mixed in the muck.

I didn't mind showing down my hand. I turned over 8 high twice and 7 high once. All of those times I was the preflop raiser and last bettor.

Should I ask to see the hand if I am the caller? Should I ask to see the hand if I am another player?