Portuguese Wikipedia is discussing banning edits from IPs. This is an idea that has been discussed for a long, long time.
RfC link: https://pt.wikipedia.org/wiki/Wikip%C3%A9dia:Esplanada/propostas/Banimento_de_IPs_(23ago2020)
There are no benefits, for ptwiki, in allowing IP editions, at least in the main domain. Over the years, IPs are slowly destroying the site.
In this scenario, the community is massively supporting the idea because we believes that mandatory registration will increase new users retention and decrease the energy spent to combat these edits, since the vast majority of which are inappropriate. Note that it is very easy to create an account.
No founding principle of Wikipedia would be disrespected. We will remain free, open, but more secure and credible.
However, there are doubts about the feasibility. There is no mention of this possibility, or any restrictions, in "Limits to configuration changes": https://meta.wikimedia.org/wiki/Limits_to_configuration_changes. On the other hand, WMF staff previously informed community members that this decision would be in the hands of the community.
a) is it possible to ban IP edits?
b) if technically possible, what level of support is required?
EDIT - Related links: