And it's not because copycat Uggs are...copycats. Rather, fake Uggs will collapse on you. Yea, they have no support in the backs and the wearer ends up stepping on the back. It looks plain old ugly and every time I see this happening, it is a pair of fakeos from Charlotte Russe or some wannabe trash store. To date I have never seen a real pair do this, and being the owner of several pairs myself, I know why.
If you think you can't afford real ones, go to TJ Maxx, Ross, eBay, Nordstrom Rack-whatever- they're affordable, thereby voiding your excuse.
Have a fabulous day!