Just to stick in another view point:
I, and even more so Halevia, have frequented Frumteens in their heyday. It was indeed refreshing to have a seriously Frum website in those days.The Hashkafah in general was very solid and it put things in correct perspective for many people.
The anti-Zionist things was a raw thumb and perhaps part of its unfortunate undoing. Rav Shapiro has adapted the Satmar approach, which is fine but far from the normative approach. To most Heimish people the Satmar obsession with ‘The Medina’ is off the mark. Had the site just kept away from the topic they might have been much better off. But the Satmar Shita is that Zionism is right up there with Avoda Zara, and a Milchamah MiDor Dor. Therefore, a lot of energy and space was wasted on that. And this took attention away from important topics.
The site itself, other than discussions with the Rav was also a great outlet for the teens to discuss things which each other and express themselves.