(D&D) A rogue can steal from the party too

Let me be clear, I'm not advocating to steal from the party all the time, nor am I advocating for a party of murderous thugs. Instead, play your character how he or she would react to the world around them. If it makes sense for your rogue to pickpocket a party member, e.g. say he or she is hiding something, then by all means try to do it. It makes for interesting situations and roleplay for the player of the rogue and the rest of the party. Final note, if you play d&d and the rogue steals from you, then respond in character and don't attack the player out of character.