This is certainly a very weird request. What if people abuse a certain tag, for example, posts that have nothing to do with bitcoin being tagged with bitcoin. It would be nice to have someone able to remove said post.
I undertand you're probably trying to avoid the /r/bitcoin censorship, but I see no reason why you can't just not use your "powers". They mighty come handy one day, for removing spam.
I would rather see the forum destroyed. "Not using your powers" has failed time and time again. I want something different.
So basically you don't trust yourself? Um, ok.
I trust myself but I don't want others have to trust me.
Regarding wanting "something different", it seems to me that @jesta has developed something different here, and your feature lessens what's he's done here. If he makes the moderation feature optional, then it increases the chances that this forum just becomes another repository for all the spam and empty content that flows forth at steemit like a broken sewer main. The answer to your problem is simple - just don't use the moderation feature if you don't want to.
How can I make sure to others that I won't use it? They can't read my mind. Also there is the downvote feature that with consensus can hide content
Others can make their own judgements about your moderation (or lack thereof). If they don't like it, they can set up a rival forum moderated differently.
I see this a valid point. It must be remembered that forum owners are beneficiaries and need to moderate their forums to protect the integrity of the forum. A forum full of spammers and trolls is not conducive to keeping good conversations alive, therefore keeping the income stream intact. I for one would not be willing to invest mucho time promoting a forum I created without having some control over abusive behavior.