Get into a faction HQ and harass other player through faction channel (type "/f" before your message ingame) so they come with you in heart assignements.
Provided i am online and available, i see no problem helping noob level up and i know many players with the same mindset. Anyway, it is a win-win scenario as the veteran gain caps during the mission and gain stronger allies in the future, while the newbies level up VERY quickly.