Can't "Post as wiki" be disabled for questions?

What is the point of posting a question as a wiki, when only the original poster knows the full background of it? I don’t have a problem with answers posted as a wiki, especially when they offer a (long) explanation that may be improved by someone who is better at explaining such things. Please disable.

Or at least disable it for anyone with low karma, say less than 100. I could imagine that it might be useful for a community discussion, especially those related to how AskLO works.

See Please add deprecation message to "community wiki" checkbox