Contemporary Marketing, 2013 Update 15th Edition by Louis Boone ,David Kurtz

Exercise 20

Pop-up ads, those unsolicited messages that sometimes pop onto your computer screen and block the site or information you're looking for until you close or respond to them, are inexpensive to produce and cost nearly nothing to send. They are so annoying to some computer users that dozens of special programs have been written to block them from appearing on the screen during Internet use.
Do you consider the use of pop-up ads to be unethical? Why or why not?