Having not read what other have said this is my take on walmart bikes.
If someone (kid adult, my grandma) comes in here and says I wanna do 4 ft drop and ride dh here is my bike (displays picture of future walmart special) I will tell him/her straight up that the bike while it may work won't last long will be very expensive in the long run and SOMETIMES may be downright dangerous.This is the only time I start knocking those bikes. If they still buy this bike for this purpose they had better not complain because these bikes are seriously not meant for it.
If someone says they are looking for a commuter / soft pack double track bike to travel around with the family, by all means purchase any bike you like.
As for weight, my ht weighs more than most people duallies so I never comment on weight (except with those monroe shock bikes. Those things are tanks wow

).
I honestly think most of us try to take each situation and give the best advice possible with regards to what they want. And it is their right to know that parts tend to break more on cheapy bikes then with better parts. Esepcially since most salesmen in big stores just try to sell the bike and don't understand what is good or not. Personally if I ever have a kid he will ride a BMX as long as possible. Tough, cheap and tough.
Now excuse me while I go irragate this would in my thigh