Discontinuity

Discontinuity refers to the concept of striking a given aspect of a continuum from one's own personal interpretation of the canon. The term appears to have been popularized by TVTropes, but the concept has existed since well before then.

General overview
Given the wide variety of tastes people have, it's only natural that there will be certain aspects of a work of fiction certain people dislike. This especially true of large universes that span multiple authors, such as Star Wars and the Marvel Universe. A more fanatical person, however, will sometimes prefer, rather than to dislike something that exists, simply to pretend it does not exist.

This has... interesting ramifications. A mild practitioner of discontinuity will simply decline to participate in the fandom of the work in question. A rabid one, on the other hand, will often attempt a warped form of proselytizing in an attempt to call others to the ways of discontinuity, which generally consists of yelling really loudly at people. At the top of the wank pyramid are those who claim to have predicted every move the author will make, and launch themselves into violent temper tantrums when they turn out to be entirely wrong.

PPC perspective
Though various PPC Agents may have pet peeves about their fandoms, it is a rare Agent who outright endorses discontinuity, as the concept, in its more extreme forms, can cause great harm to the continua. The most prevalent problem caused by discontinuity is the "fixfic," a type of fanfic that attempts to "correct" perceived "problems" with the continuum. Aside from that, discontinuity is probably third only to ships and subbing vs. dubbing as a cause for fandom-based flamewars.

On a personal note, practicing discontinuity is unlikely to get you much sympathy from Agents Chliever and Samuel, among many others.