This is how a Twitter hashtag dies.

The #YesAllWomen hashtag appeared over the weekend after Friday's killing spree in Santa Barbara, Calif. Police blamed the killings on 22-year-old Elliot Rodger, a Santa Barbara City College student who had posted disturbing videos to YouTube, including one a day before the shooting that said he intended to kill women -- a response to his romantic shortcomings.

Many of the tweets from feminists using the hashtag to express their feelings in the wake of the shooting angered conservatives, who noted an anti-male theme in the conversation.

Then Iran's theocratic supreme ruler, Ayatollah Ali Khamenei, jumped in Monday.

If the irony of the head of one of the world's most misogynistic governments trolling a feminist hashtag to promote theocracy isn't enough to kill it, I don't know what is.