1st let me qualify that I am talking about adolescents. Not 20 something unmarried women.
Some people take the stance that not having a baby shower is "punishing" the mother. If that is true, then the opposite is true, that having a shower is rewarding them. I have 4 kids. I have never had a shower. Not one. All of my kids are adopted (2 from birth), does that mean I have been punished for not being able to have biological children?
In all truthfulness, a newborn has very few necessities. Food, shelter, clothing, diapers, a crib, a car seat, and medical care. Other than the car seat and diapers, none of these things need to be new or expensive. (well the diapers don't need to be expensive, just new) All the rest of the "things" you get are conveniences or luxuries. ...and again, most of the "things" you get at a baby shower get you through only, if you are lucky, the 1st year.
Unfortunately, teen pregnancy does come in clusters. We have all seen it in the news. Remember teens live in the moment (which is part of the reason they get pregnant anyway) What some see is all the attention the teen mom gets. The ohhs and ahhs over the cute clothes, the belly rubbing, etc. The sweet little baby you can dress up, and do it's hair and show off. They don't see the reality. The lack of sleep. The colic. The crying, the temper tantrums. The lack of social life. The fact that the novelty will wear off, and your childless friends will abandon you to go out on the weekend, rather than stay home with the baby. Other teens may see all this attention and see it as a way to get it, too.
While all teen mothers are not doomed to a life of failure, the truth of the matter is that most do not go on to college. Most are left with a high school education, at best, and lower income employment. It is wonderful that the teen moms on here could do that, but it is not indicative of the general population.
People are right that a teen mom will need more support than an older mom, but the kind of support they need is not the kind they will get at a party. They need to be educated, they need an example, they don't need cake or balloons. The shower is for the mother, not for the baby. Instead of celebrating a teen pregnancy maybe it would be better to take the money that would be spent on a shower and spend it on parenting classes or start a college fund for the baby.