Certain Barisan Nasional leaders should not "bersandiwara" (play-acting) in front of other coalition party members and then later backstab them, says Datuk Dr Mah Hang Soon.br br Speaking at the state Barisan convention in Ipoh, Perak, on Sunday (Nov 24), the MCA deputy president warned that such an act could jeopardise ties between component parties and weaken Barisan’s chances in future elections.