PepsiCo Inc.’s Frito-Lay unit uses online video games and concerts to disguise marketing campaigns for its Doritos chips aimed at teenagers, consumer groups said in a complaint to U.regulators. The Federal Trade Commission should investigate PepsiCo and Frito-Lay for deceptive and unfair digital marketing practices, including collecting teens’ personal information “without meaningful notice and consent,” according to the complaint filed today by the Washington-based Center for Digital Democracy, Consumer Watchdog and two other groups.