Sorry for committing two sins, one for double-posting (i.e. making another post after yours) and another for bumping a thread (come on, it hasn't been "dead" for that long), but this has came across me.
Zealous, "Die For Our Ship" Shippers.
So what if your shipping is not canon? That the writer even makes the rival shipping canon? I mean I've seen people get pissy all over whether Sonic should go out with Amy Rose or Sally Acorn, and if he should also bone one of them. If you're on the Sonic/Amy side, you see Sally as a useless harlot who should be killed (and even then when I was an asshole enough to bicker with Sonic/Sally supporters, I considered all the "kill" art for Sally disgusting and it made the shipping I supported look bad). If you're on the Sonic/Sally side, most of the time you've shipped Amy with Tails and don't consider a particular character worth killing for your ship. On the bright side, there are those whose OT3 "Sonic, Amy & Sally," but that is if you support two out of three of that shipping or are okay with polygamous relationships (which, to people like Chagen/Agni, there really isn't much wrong with, as long as you consent and love each other back).
That's one example, all which I had experiences with, but one example that really pisses me off is the whole thing with Harry Potter fandom (you know... Harry Potter & Ginny Weasley and Hermione Granger & Ron Weasley). In fact, when J.K. Rowling, who had decided that Ginny would be Harry's "soulmate" early on when writing future installments, wrote the relationship as Harry/Ginny, not Harry/Hermione, the fandom got pretty cross (an understatement). They accused fan-sites whose webmasters interviewed Rowling herself of having "Ron/Hermione bias," often leading to shit-storm which has even been parodied in a fan-fic named after - even based - on a freakin' song by Synthpop duo Erasure. And for shit that is serious, there was some flower-girl who rambled about every Harry Potter book sold being sent to abortions in China, expecting to pull the heartstrings of anti-choice pussies who were already pretty irate about something so simple and so stupid as getting your preferred shipping Jossed.
And then there are shippers whose shippings are totally illogical and without rhyme and reason. Of note, there are (just a few) people who actually ship Mordecai of The Regular Show with Twilight Sparkle of My Little Pony: Friendship is Magic. I mean, at least these shippers are peaceful, but what the hell.
Often times, I just want to ask all of you shippers "WHY?!?"