Recently, a company in Denmark called "Njord Law Firm" sent out about 25,000 penalty letters to Swedish citizens regarding downloading pirate movies from Piratebay, Popcorn time, or as such. They got this information from ISPs with a permission from the court. They are asking for about 4,500 Swedish Krona (~514 USD) as a fine for downloading a copyrighted movie material (on behalf of a bunch of film makers/producers). They also mentioned that if subsciber don't pay this amount, they will increase the fine and/or they will file a lawsuit against them!
The surprising thing is that they are a 100% legal company and the letter seems legit! I can confirm this is not a scam, as we contacted police and our ISP.
Considering almost all internet subscribers today have wifi routers and open internet access, its too vague who had really download such copyrighted materials. If they really file a lawsuit against the subscribers (in case of no payment), can subscibers claim they had a wifi router and they provided the username/password to so many people and its not clear who is the "guilty person" ?