What motivates trolling?
There are many motives but the most common on support communities is either attention seeking or site/product promotion. In some cases trolls are motivated by a direct financial gain (by requesting funds or suggesting gifts). In most cases the trolls will try to collect personal information directly or indirectly, such as email addresses, postal addresses, passwords, phone numbers. The trolls may enjoin you to sign-up on another site or email list that they control with similar motives.