Fans of “Big Brother” are trying to rig the game by screaming at the show’s studio wall to help some houseguests with outside information … and now CBS is beefing up security. Sources with direct knowledge tell TMZ … many fans have been posting for the past several weeks to throw stones from the house of ‘Big Brother’, using bullhorns to send messages and help some houseguests move forward Sending message Our sources say that fans watch the show and scrub the live feed, so they know about the game plan of the cast … and the whole thing is becoming very disruptive. We have been told that CBS security and LAPD were initially tasked with tracking fans, but things were not getting better so CBS was recently brought in to help a private security firm. Our sources say that security had to do a foot chase with a male fan who attempted to scale a studio fence, but the man got away after jumping into a stampede car. BTW … we are told that people in their 40s are trying to send a message to most homeowners with no young fans. Together Season 22 is still in production, Our sources say that LAPD is also more visible in this area and is keeping a close watch on the area where fans keep collecting. We have been told that there was also a drone scare and a rumor floating on social media that someone is going to throw a banner over the fence… but the biggest nuisance of fans on Bullhorn so far. ‘Bibi’ has descended this road before … We are told last season that fans resorted to tennis balls carved with messages over the fence and onto the studio in hopes of reaching fans. Don’t people have anything better to do?