This is genuine request to Mr. KalidasBhaiSaab. If you are not passing other cars it is illegal to drive left most lane. Yes people will be pissed off and will tailgate you because you are making road congested by driving slow. As Royal Scorpion said most of the people do not have problem of you driving slow but you have to be in right lane if you chose to do so. Even if speed limit is 70 and you are driving 70 but you are not passing other cars then you do not have right to be in left most lane. Not only it is illegal but it's quite dangerous for you and other people. In fact in some state cops can pull you over for this reason.