Links provide a way of determining whether statements made are fact, fiction, or whimsy. Generally multiple sources can be found on the internet to enable independent verification. Posting links is merely a helpful way of pointing people in the right direction and giving a rapid
determination of where the truth may likely lie.
   Any statement made that is the least bit contentious should be given supporting links. If a person cannot be bothered to offer support for their statements/conclusions, then why should we bother reading them?