You guys can do what you want with your buds, to be honest I really only care about my own. I can only tell you by experience that both methods work. If your growing so much bud that its being smashed by the weight, try using more than one bag. Each method has its pros and cons and there's a reason why there are more than one way to dry buds.
Screen drying is practice more for comercial growing because you can dry buds quick but is damaging to the buds exterier and its vary easy to over dry them. Screen drying is also preferred when humdity levels are high and can't be controlled.
Bag drying is more for the times you have too dry of a area or you don't have a dark place to dry buds. This is practice mostly by homegrowers with small crops and if humidity is a issue, just put the bag in your oven (as long as it is a gas oven). The pilot light makes sure that outside of the bag is very dry. But (there's always a but lol) bag drying is not for areas when the humidity is over 50%.
Hang drying. Its about the easiest of all methods, no rocket science in this but you need a area thats dark and large enough. Pot snobs also prefer it cuse its the least damaging to the buds. Hang drying is best done when humidity levels are between 45 to 60%.
There are many more pros and cons to each method but I just don't see why I should put the effort to list them all. After all, if you can grow a plant to produce the fruits of your labor, you can figure out how to dry some buds.