Another tactic which I came across has me absolutely amazed.It is of a slightly different nature, being a computer program that I purchased from a company. During the course of the year, another company bought out that company and sent me notice that I couldn't use the program any more as I had to rent the right to use it from them on a yearly basis. When I stated that I thought I should have the right to use it as I purchased it legitimately, they rendered it unusable from their end. Nothing I can do about it according to consumer affairs over here, because it is an American company.What I did do was not use any of the products I had purchased from the new owners previous to this happening and I deal entirely with different companies.