If you're on a DM quest of mine, and you choose to steal treasure without letting the rest of the party share (or loot a PC who's fallen, etc.) please inform me through a DM message. I'm not sure how other DMs feel, but it's difficult to keep track and it's rather annoying to think you did a good job handing out treasure for a group and not realize that due to a character's action no one on the quest ended up getting any loot at all.
To clarify, it's not forbidden that you do so but I would like to be informed at the very least.