There are many kinds of trolls. Most can easily be ignored, but there are many that can't. Two that spring to mind are the persistent attention takers (switch

There are many kinds of trolls. Most can easily be ignored, but there are many that can't. Two that spring to mind are the persistent attention takers (switching or maintaining multiple identities as necessary) that amount to a DOS attack, and those who are able to look like signal for a long time before it becomes clear they're just trolls. In other words, not caring what trolls say is necessary but not sufficient.