Regardless of the strict definition, trolling (and antisocial online behaviour in general) can have serious physical and psychological effects on victims. (psychlopaedia.org)
There are a range of new apps and software that block, filter and monitor online behaviour. (internetmatters.org)
One of the most common ways to track online behaviour is through cookies — small pieces of code that are downloaded into a user's browser when they visit a website. (creativeboom.com)