Alyson Hannigan gets restraining order against online stalker

'How I Met Your Mother' star Alyson Hannigan has been granted a restraining order against a man, who allegedly threatened her online. The 38-year-old actress requested a protection order against John Hobbs, who she claims has been harassing her via a number of social networking sites, reported Daily Mail. In the request, filed by her lawyers in Los Angeles, Hannigan claims that Hobbs is "mentally unstable and was recently discharged from a mental hospital." The restraining order also protects her actor husband Alexis Denisof and their daughters, Satyana and Keeva Jane. A hearing has been set for March 6 to decide whether the order will be made permanent.