Hecklers are those individuals that look to ruffle some feathers. Many forums have them. One writes a post, the thread gets interesting and then a heckler comes in. Hecklers walk the fine line between providing a quality reply and a reply that is simply there to provoke. Its very subtle but yet, those intimately involved in the thread, know the individuals prime objective. In reality, the heckler might not consider himself or herself to be a heckler. They just might think that they know better and demand to be proven wrong or outsmarted.
Bottom-line, hecklers run their course.