Just because she COULD be doing a lot worse doesn't make what she is doing right.
I was a mother of two by age 25 and funny, I didn't feel the need to party hard with my friends. It must be nice to afford surrogate parents for your kids. I really feel sorry for those babies. I also didn't have social services knocking at my door twice in the first year of motherhood.
It seems like she is trying to recapture her old life. I don't think the public is going to be so forgiving. And how long will it be before the big guns (i.e. madonna et co) will no longer support her if she chooses to behave this way. Madonna has already told her that the only way she'll support Britney's new album is if she quits her 40 fag-a-day habit!
I think there is a lot more going on in the world of Britney than what we are seeing - which is already too much! But then again.. She's country!