mental disorders, especially autism and anxiety. Extra lulz points if the cow attempts to excuse its subpar behavior with one.
a hair-trigger temper
whining about people criticizing it or its associates, even though it has attacked others for petty reasons. Extra lulz points if this happened more than once.
obvious inconsistency, such as "Rules for thee, but not for me!"
on a similar note, a series' alleged fan ignoring said series' messages (e.g. Don't lie, respect others, spend money wisely, manage your time carefully, etc.)
poor long-term memory. I know Brain Age is a mixed bag, but there are plenty of other brain games out there.
accusing detractors of "projecting." Extra lulz points if it lashes out at others with the same flaws as it.
quitting attendance of a post-secondary school instead of not going there in the first place
nonsensical headcanons, such as transwashing/transing, Flanderization, etc. Extra lulz points if the cow defends them.
improper capitalization, spelling, grammar, or punctuation. Extra lulz points for combinations.
begging for donations when the cow already has a truckload of money. Extra lulz points if the cow is prone to frivolous purchases.
not doing research. Search engines are a few of your most valuable tools, so use them.
not knowing how to administrate or troubleshoot a computer. Extra lulz points if something gets hijacked.
acting like a child when the site is targeted towards adults. Extra lulz points if the cow is a moderator.
flamebaiting. If you're so desperate for a fight, just play a fighting game.