Investor’s Business Daily – Two-thirds of IT managers don’t stop company employees from downloading music online, and only 1 in 5 block them from social networking Web sites. While a study found managers are worried about lost productivity and security issues, they also are concerned that blocking access to sites might hurt staff morale. The study, funded by antivirus software maker McAfee, also found that about 20% of workers let their friends and family use company computers, about 50% connect their own gadgets to their workstations and about 60% store personal content on company PCs.