Dear fellow bike commuter. It isn't that I don't appreciate that you are making the effort to cycle to work or that I want to discourage you from doing so. However, when you are cycling at a leisurely pace and someone on a bike passes you on a busy street (or any street really) it is better etiquette to not ride into a not yet changed red light further along thereby passing said cyclist who is waiting at the red light so that they then have to trundle along behind you until they find another safe opportunity to pass you all over again.