With all the fake reviews and flame wars of a few in current times I see this point as very valid and would at least take everything stated or claimed on such forum with a big grain of salt. Small vocal and organised groups are able to give the impression of a minor issue to be major. In top of that are many people who jump onto such topics. A good example is the recent vote for a vaccination mandate in Germany. Representative polls show a clean pro law attitude in the population yet the politicians have been flooded by anti vaccination 'activists' on all channels.

Samsung makes enough refrigerators that if you told me 100,000+ people were pissed off enough about theirs to complain on Facebook I really wouldn't doubt it. Also what would you gain from complaining on Facebook? Are these people being paid by LG to trash Samsung products? Does Samsung pay people to trash LG refrigerators on Facebook in return?

Unless there's some kind of evidence to the contrary, I would just assume these people are unhappy with the refrigerator they bought.