So I've been home visiting family/friends for 3 weeks, and my cousin and his girlfriend (ages 20 and 19) have an almost 4 month old. Since being home, the grandma has had the baby 3/4 of the time, I'm not exaggerating either. And this is the 3rd overnight my parents have had him. It just really irks me that they "pawn" him off on others, a lot. I understand they are young and need time off from the baby (just like every parent does). I know it's not my business to worry about it, So that's why I am ranting here. The father will come home at 3 in the afternoon and make himself a drink, (he's 20) and then they like to go out together and drink. I know that parents do need nights off, but their kid should be their priority. I don't mention any of this to my family, but my friend does agree. The mom also refuses to give her baby some of the shots he needs. Well he will have to get them eventually to go to school.
Question: is it recommended to use the car seat without the base? They do, and I guess you can do it that way (according to their carseat instructions) but I guess it makes me nervous.
I know they are young, and I hope they grow out of the go out and drink every night stage. I know they really do care for the baby, it just breaks my heart that he isn't with his parents a lot. (The mom doesn't work btw).

Re: Small rant/concerning question
I would definitely use the base. I was under the impression that the baseless option was for emergencies, or places like NY where you maybe in and out of taxis where you are unable to have the base. If that was the case for us though, I would use an European style car seat instead of an American style.
Wow @tayzav that sounds just awful! That little girl needs a stable environment. I hope things go easy for your brother to get custody because clearly she is not a mother!