Well in that case there would not be any wrong with it but generally what I see a lot is people needing on other classes gear and thinking it's okay to rip out 1/3 of the gear. More times than not if the heavy armor piece drops it does not have my stats.. in fact I can't remember the last time I saw in a hard mode flashpoint a piece of heavy armor drop that was perfect for my sentinel. It would have way more endurance and less power (just a example) so just to clarify I'm implying that if trooper boots drop and you are a sentinel then you have no reason to need that item. Even if the enhancement or the armoring would be useful to you unless there is no one else in the group that could benefit from them.

No I disagree Needing on a piece of gear so you can pull one enhancement out of it is in my opinion bad etiquette. The only time I would feel that would be okay is if no one else could use the piece better.