Praise be to Allah, the Lord of the Worlds; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.
It is totally unacceptable for the questioner to say: “Some Fatwas are invalid” unless he specifies a Fatwa and clarifies the aspect in which it violates the principles of Islamic Law. However, the internet provides a window of opportunity for the Muslim scholars to convey their view points and knowledge to a larger audience, thus they should make use of it as much as possible. And Allah Knows Best.