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The gesture - involving the thumb and index finger pinched close together - was the logo of Megalia, the now-defunct radical feminist online community widely perceived to be anti-male.

The T-shirt was being sold by Megalia to finance lawsuits brought by women against men they alleged had ill-treated them.

Megalia is radical but even within its ranks there is a feeling that it may go too far, over, for example, whether to out gay men who marry women as a cover for their homosexuality.

That sexism, Megalia activist Alex Song says, feeds off images of "sexually exaggerated" women on screen.

There's no doubt Megalia is controversial and confrontational.