Pictures of these scary looking dustmites are sometimes shown to consumers by questionable vacuum cleaner salespeople trying to sell machines priced a thousand dollars higher than most good vacuums.

The latest medical information on dust mites suggests that vacuums don't help: Getting rid of dust mites—worthwhile?

By the way, some salespeople have also used AIDS to frighten people into buying vacuums. When AIDS became a known problem, consumers were told that the vacuums were air filtration systems that would protect families from the disease!