Note that the ECHR has jurisdiction over the European Convention on Human Rights, which is attached to the Council of Europe, which is a pan-European organization that provides the "lower end" of protection in Europe. Even Russia is a member of the COE.
The EU, on top of requiring COE/ECHR membership provides additional protections under the EU Charter of Fundamental Rights. The highest court for EU law is the European Court of Justice, not the ECHR.
Then on top of that, a number of EU/EEA countries have much stricter rules, some are outlined in the article.
So it's technically right in that it is legal in signatories to the ECHR provided they are not covered by other, stricter rules via one of the other routes, and many are.
The EU, on top of requiring COE/ECHR membership provides additional protections under the EU Charter of Fundamental Rights. The highest court for EU law is the European Court of Justice, not the ECHR.
Then on top of that, a number of EU/EEA countries have much stricter rules, some are outlined in the article.
So it's technically right in that it is legal in signatories to the ECHR provided they are not covered by other, stricter rules via one of the other routes, and many are.