Gaming the system means using policies and guidelines in bad faith, to deliberately disrupt the RuneScape Classic Wiki and the process of communal editorship.
An editor gaming the system is seeking to use policies with bad faith, by finding within their wording, apparent justification for disruptive actions and stances that policy is clearly not at all intended to support. In doing this, the gamester separates policies and guidelines from their rightful place as a means of documenting community consensus, and attempts to use them selectively for a personal agenda.
Sometimes gaming the system is used to make a point. Other times, it is used for edit warring, or to enforce a specific non-neutral point of view. In all of these, gaming the system is an improper use of policy, and is strongly frowned upon. An appeal to policy which does not further the true intent and spirit of the policy is an improper use of that policy.