Despite a series of high profile cases involving so-called “trolling”, computer hacking, harassment and abuse via anonymous accounts, Twitter provided information to investigators just once in the second half of last year, its second biannual Transparency Report said. It was the only time Twitter provided British authorities with information in full or in part, out of 25 requests. In comparison, authorities in the U.S. asked for information about Twitter members on 815 occasions and received it in 562 cases.