Complete manual/277/en

When trolls are really committed to harassing you, however, blocking doesn't really help. A determined troll can create numerous different profiles (called ‘sock puppet accounts’) to continue the harassment, and this means your blocking has to keep up with their generation of new accounts. This quickly becomes very tedious. Historically, platforms like Twitter and Facebook have not handled reports of intimidation and online violence very well. However, this is beginning to change as they recognise the severity of problem and see how it deters people with important voices and large numbers of followers (or friends) from using their services.