A question for DMs; do you feel it is rude if a player is doing these things?
It doesn't matter what I feel about this. I can't change the bad behavior of people who don't want to change.
This is especially the case when an rpg game has "obligation players". The "obligation players" are individuals who are playing because they owed the DM (or another player) a favor of some sort. For paying back a previous favor, such "obligation players" just participate minimally and have very little to no incentive to do much more. In essence, they are just biding their time until they feel the "debt" is repaid to the DM (or another player).
Would you ask him/her to stop?
If I ask the players to stop, they generally don't listen to me.
If I constantly make it an issue, such players will just get up and walk away from the game.