Você pode experimentar este JavaScript do usuário do Flashblock para o Opera: link
Descrição do site:
Flashblock is an addition for the Opera that blocks all Flash, Silverlight and Java content from loading. It then leaves placeholders on the webpage that allow you to click to download and then view the Flash content.
My settings are Preferences -> Advanced -> Content -> Enable Plugins "Yes"; Enable plugins on demand "Yes"
panopticlick still can run my java and my flash without asking me. Also, some sites have a lot of flash banners and only minor part (~1/3) are stopped in "Click to play" and most are activated without any clicks.
Acredito que isso seja um bug do Opera.
Veja essas postagens do fórum do Opera informando a mesma coisa:
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="http://my.opera.com/community/forums/topic.dml?id=1048122"> link
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