Apologies, I bore myself on these threads, but I just can't resist ...
Buying from any source will only perpetuate the puppy farm market. The only way to guarantee not buying from a puppy farmer is to buy from a friend of your yours who is having a (single) litter from her family pet.
Sorry, absolutely don't agree with that. Perhaps you mean the only way to guarantee it when buying a cross-bred puppy?
For me, I think it would possibly achieve that, but to be honest it is the knowledgeable breeders that we need to support, not the people who decide to have a litter from their pet to fund their next holiday.
Good breeders have high standards for their buyers rather than just selling to anyone who asks, offer a lifetime's support, health test, know their lines inside out, know how to assess temperament and match the right pup to the right home - on that basis, I guess they can be a bit scary, and no they won't take a million photos with teddy bears and flowers.
In honesty, many owners would find it entirely impossible to buy from a good breeder, because they don't offer a good enough home and good breeders have long waiting lists and can be very choosy.
YourFace - in response to your queries, I would perhaps offer the opinion that it is adults who need to choose a dog, not children, and surely children will love most puppies anyway - although obviously there is peer pressure around the fashionable breeds and crosses.
I'm glad that you are worried about the possibility of supporting a cruel industry. If you feel inclined to answer, what are your requirements, what have you ruled out, and why?