Comment by kunley

It also does harm to the communities of smaller Wikipedias:

'a user from the Tumbuka Wikipedia reported that they had initially felt "hope and joy that a small community had then gained another native editor", before finding out that this account had been a promotional sockpuppet.'

Allowing mass machine translation of Wikipedia articles into other languages is a problem, because it floods smaller language wikis with low quality text. If a user wants machine translated pages, they can machine translate them themselves.

One incident like this is not a huge problem, but it sets a terrible precedent that could turn Wikipedia into the same sludge as the rest of the internet. Best to nip this kind of thing in the bud.