If I'm not getting any of the advantages Oz mentioned, I don't mind checking it down. If I have Tp then I'll ussually build a small side pot if I think the first All-In could have weaker holdings.
Usually it bugs me when somebody bets into an all-in pot that I'm in as an overstack. But that's ussually because I'm drawing. So I figure in pot odds
and add a player note. I called a guy down once with 2nd pr and a straight draw, failed to make my straight, but it turned out my 2nd pr was good enough to take the pot(s).
Made a note on the player that he bets with K-high in an all-in pot and that was that.
The expected etiquette of the table should not alter your style of play. You play in a tournament to try to win - not make friends. Any action that lessens your chance of victory is foolish.