When one becomes frustrated with the way a policy or guideline is being applied, it may be tempting to try to discredit the rule or interpretation thereof by, in one's view, applying it consistently. Sometimes, this is done simply to prove a point in a local dispute. In other cases, one might try to enforce a rule in a generally unpopular way, with the aim of getting it changed.
Such behavior, wherever it occurs, is highly disruptive and can lead to a block or ban. If you feel that a policy is problematic, the policy's talk page is the proper place to raise your concerns. If you simply disagree with someone's actions in an article, discuss it on the article talk page or related pages. If mere discussion fails to resolve a problem, look into dispute resolution.
Practically speaking, it is impossible for Wikipedia to be 100 percent consistent, and its rules will therefore never be perfect. If consensus strongly disagrees with you even after you have made proper efforts, then respect the consensus, rather than trying to sway it with disruptive tactics.
A commonly used shortcut to this page is WP:POINT. However, just because someone is making a point does not mean that they are disrupting Wikipedia to illustrate that point. As a rule, editors engaging in "POINTy" behavior are making edits with which they do not actually agree, for the deliberate purpose of drawing attention and provoking opposition in the hopes of making other editors see their "point".