ORLANDO, Fla. — Students and parents have voiced mixed reactions to the University of Central Florida’s plans to randomly select students for COVID-19 testing, with some questioning the legality of mandatory testing and the penalties students who refuse will face.Since the policy, which also applies to faculty and staff, was announced Sept. 15, a debate has raged on social media. Some think the testing is a valuable safeguard against outbreaks of infection, while others argue it will be intrusive and ineffective.In Facebook group “UCF Parents,” one of the group’s roughly 11,700 members comment…