Do you know a religion or cult that suppresses free speech?
If cult leader would say to you, "we reduce ignorance by not allowing all to speak", would you think it is reasonable or not?
I think limiting free speech increases ignorance, because then people will know less. Do you agree with this, or is there some good reason to think the opposite?
Freedom of Speech can be a good thing, but it depends on how you use it. I think most religions include a reference to condemning people telling lies for example and that is understandable given the damage they can do in our relationships.
Prohibiting Blasphemy isn't something I would enforce, but you can understand the need to treat certain objects or subjects with humility and reverence, even when you disagree with them. False beliefs can have as much power to influence behaviour as the truth simply for being believed. You can appreciate the effect and meaning a person's beliefs may have on them without agreeing with it. A certain level of compliance is polite, so long as it specific to a particular situation (e.g. going in to a temple) and doesn't cause you or anyone else harm.
I think a religious or cult leader can make a case that "less is more" and that we have a tendency to abuse our freedom of speech by treating our words, our thoughts and our ideas too casually. A certain "economy" of speech, of choosing your words carefully, on speaking on subjects which you only have some knowledge or interest in and arguing out your positions, would seem fairly justified. It is far too easy to criticise when you understand very little, but being precise and accurate in your criticism so as to make them valuable and accessible to those who they are directed at is
much,
much harder.
I wouldn't put these down as any legal limits on free speech. But there are always informal rules and customs where society enforces it's share of taboos based on a shared understanding of what is appropriate. they change over time to suit the context but they are always there. Absolute freedom of speech doesn't exist, even in law, because society has to regulate and prevent conflicts that arise. But generally it is better for people to have the freedom to "agree to disagree" and to voice dissent, than not to be allowed the chance at all.
[As for the Poll, I'm going to stick my neck out and vote that freedom of speech does increase ignorance (or at least allow people to exchange ignorant and misinformed opinions) as that is true in at least some circumstances.]