No authority should exist that claims to know and decide what is truth and what is not.
Actually is there any "
Absolute Truth". I don't think so. Truth is also subjective and it is defined according to the standards that we prepared. It can be True for some valid standards and it can be False to another equally valid reference standard while both standards are prepared by us. I think if we can practice the habit of listening to what other peoples have to say regarding any issue which will reduce the day to day problems by big percentage. People can spread the misinformation( If we classified true information as information that are scientifically proved) but at the end of the day we are the people who decide whether it is true or false from a valid reference standards which we knew( That standard also can be amendment or revised in future). I think we should not control the "Freedom of speech" of anyone as a people who still believes in democracy. If we control the Freedom of speech then the society can be goes again to the dictatorship which we actually don't want.
So always listen what others have to say and they can be looking from a different angle where we wouldn't see. I can give you a simple example of what we have taught in our schools. They always taught us 1+1 always equal to 2 and we all are taken it is the absolute truth. But think about one drip of water sums up to a another one drip of water, the answer is not 2 drips of water but 1 drip of water.