This have been a joke for a few years here in Brazil, we call the day "Black Fraud" (sounds a little better in Portuguese) The relevant point is that Black Friday is an "artificial" event here: we do not celebrate Thanksgiving Day so there is no need for a the stores to get rid of unsold inventory. It started just ~10 years ago when marketers began advertising it as a sales day.
I mean if people didn't like it wouldn't it go away? What is the fraud involved? I am sincerely curious. Are the sales fake or something? like they have very limited inventory and just get people in and while they're there the store hopes they'll buy an alternative? That used to be a big thing around here but generally these days if you get there early you can get the deals, or if you sit up late and buy on the web s…
The "marketing/sells" guys decided that prices for products changing daily is something profitable, Keep a tab open to some product and refresh it daily, see how prices change and how you get tricked.
So for Black Friday they will increase the prices before the sales and then put a giant "25% off" label. They also can say advertise with some super deals like super cheap laptop but they might have only 1 device. So in Romania we have laws and big companies will be fined heavily and shamed for this evil tricks(not sure if this is an EU thing or only local).
Maybe you mean "fraud" is not the correct word and there is a better legal word that fits for this evil and illegal(on some regions) behavior.