It is being recently reported on Portuguese Wikipedia and Commons (at
least) the increasing ammount of improper editing coming from IP addresses
located in Angola. Some users believe that this may be related with
Wikipedia Zero and a partnership between WMF and a cellphone company 
that allows reading and editing at free cost.
One of the first reactions to that is a large range block that was just set
on Commons in order to prevent these edits , as they are being done in a
way that volunteers can't handle.
That seems to be some kind of "second wave" as the first that hit Commons
 had been already reported months ago  and seemed to be controled or
just paused for a while. On Portuguese Wikipedia, one thing that seemss to
be clear is that edits are done in good faith. However, they end by being
undone as they are incorrect for some reason, whether being pages of files
about themselves or just test edits. One of the users identified actually
confirm  that he is editing through Wikipedia Zero.
Concerning that more partnerships may occur in future, I think it is time
for us to start talking about ways of dealing with that, other than
blocking. Sadly, I don't have an answer to that problem, but I tend to
believe that some way of mass reaching these potential users should be made
The current process is that editors will be the ones to notice that (as I
am not aware of any kind of follow up by WMF on that) and they will try to
solve their way, which may cause too many collateral damage.
I wonder if there is any kind of way to diminish the problem, by using any
 - https://commons.wikimedia.org/wiki/User:Teles/Angola_Facebook_Case
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