IMO it's a good idea to use a VPN when accessing any pirated content, as a general rule. While there are exceptions (e.g. usenet, specific countries with piracy-friendly laws/enforcement) and it's arguably unlikely end-users of pirated streams would be prosecuted, why take the risk? It's cheap insurance and there are few downsides. In some countries ISPs will act on reported piracy at your IP address and you could have your internet cut off or suspended, and/or be fined. So, better safe than sorry.