Natalia has decided to show her disdain for Sol Campbell's claims in a BBC Panorama documentary that fans travelling to Euro 2012 'could come back in a coffin'.
She wore a T-shirt which bore the words 'Bad Boy Campbell' (spelling BBC in an acrostic) and on the back, 'BBC is wrong!'.
Siwiec is not the only person to criticise the BBC and Campbell - England fans also mocked his pre-tournament advice to stay away.
They paraded a coffin before England played Ukraine at the Donbass Arena and declared Campbell's concerns 'ludicrous'.