My own picture of Sergei Zheleznyak. These are the reasons why he ended up on the EU sanctions list: "Deputy Speaker of the State Duma of the Russian Federation. Actively supporting use of Russian Armed Forces in Ukraine and annexation of Crimea. He led personally the demonstration in support of the use of Russian Armed Forces in Ukraine."
For the whole list of similarly unimpressive figures, including the reasons why they're there, page 13: http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ%3AL%3A2014%3A078%3AFULL%3AEN%3APDF
None of them probably actually minds being put on the list. Quite on the contrary, it will be mostly perceived as a point of honour and a proof of their dedication to the cause that might actually contribute to their political career.
It is absolutely unclear how such measures might contribute to "bring about a change in policy or activity by the target country, entities or individuals" which is the declared goal of EU sanctions (http://www.consilium.europa.eu/uedocs/cms_data/docs/pressdata/EN/foraff/135804.pdf