Back in the day on the Land Before Time wiki there was a lot of vandalism, so we disabled anonymous editing.
Nowadays though there's no vandalism anymore but there is a lack of people contributing because people without an account can no longer edit. We have more than enough admins to stop vandalism so it shouldn't be a major issue. So how do I re-enable IP addresses editing? I can't find the option.
It may not be there because the setting may have been set by staff. My understanding is that, for certain wikis for which the viewership is likely to include a larger portion of under-13 users, Wikia has a separate method for restricting edits that is reserved for staff. In turn, they disable the typical WikiFeatures method.