It's not true that all the gift card sellers are trying to scam with fake gift cards. Sometimes people get gift cards they simply don't need as presents for their birthdays or for Christmas etc. and they try to sell them later on for less than the face value in order to get rid of them more quickly. There are legit sellers out there for sure.
Do you know someone who has been a victim of such a scam? If yes, did they try to contact the brands customer service to alert them?
How do we report anonymous gift card forum scammers to customer support if we only know them by their forum handle? Are you going to report them to the police yourselves or what?