I know people advise never to open spam email & phishing email, & click on links etc, but I occasionally like to reply with made up account details & product keys, just to give them something to try, lol. I also like to do similar with the junk I get through my letter box at times! I get 2 prepaid return envelopes from prize companies, & send them each others prize winning scratchcards & free offers, lol. & then they have to pay for their postage aswell.