I'm annoyed by getting counterfeit vacuum cleaner filters at the same price or higher as real ones, but anything where counterfeit could be dangerous I complete

I'm annoyed by getting counterfeit vacuum cleaner filters at the same price or higher as real ones, but anything where counterfeit could be dangerous I completely avoid (like, for example coffee filters or easily counterfeited electronics.) In the US, retailers always said Amazon was cheating by avoiding sales tax. The real competitive advantage they have is avoiding all of the legal liability of the products being sold.