Tit-for tat restrictive measures imposed by Kyiv and Moscow since 2014 have hit many expected areas, from energy to food imports to transport. But Ukrainian President Petro Poroshenko’s latest strike at all things Russian looks set to backfire: a decree published on May 16 that prohibits Russian social media and other internet sites used by millions of Ukrainians has drawn sharp criticism.

Targets of the ban, drafted by Ukraine’s National Security Council, include the Yandex search engine, anti-virus companies Kaspersky Lab and Dr.Web, and the 1C accounting software that is used by thousands of Ukrainian companies.

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