Have your printer/fax machine to answer after 4 rings.... After awhile most give up but some still try... If more people do it and that is all they get, it will make them pay out of their pocket.. The over head will cut down on this crap...
Yes I get this call about 10 times a day on my landline phone..I think they target the elderly also because I tell my mom who is 83 not to answer but I am not always home so I blocked them on my landline so the phone only rings once and hang up....They cant get through....But their name still comes up on the caller ID....THEY ARE ANNOYING...