You don't need a sockpuppet investigation to ban someone on English Wikipedia for abusing multiple accounts, so I doubt it would be a requirement on a small project like Wiktionary. As Salvidrim points out on Reddit, there is a process trail of sorts......
https://en.wiktionary.org/w/index.php?t ... f=49486218Deleting a blocked user's talk page however, that's just bizarre. It happens on bigger projects, but not typically as part of what seems like a standard sock block.
It all ties in with the idea that these smaller projects, due to their extreme vulnerability and lack of oversight, are just run by a couple of hardliners who treat it as their personal fiefdom.
I would however take the words of Wikipedians about the shortcomings of their so called sister projects with a pinch of salt - a lot of them cannot stand the fact the movement is bigger than just Wikipedia, and resent the fact that the governance decisions of Wikipedians and indeed what they consider best practice in a whole host of issues, are often completely ignored by other projects. Many Wikipedians are quite open about the fact that view sister projects at best as merely a place to dump unwanted content and users, and at worst, actual enemies.
Certainly at least half the things I've seen said about Commons by Wikipediots is complete and total bullshit. And only some of that can be down to just ignorance.
The single biggest reason Wikinews died, is because Wikipedians want their encyclopedia to be the goto news site of the cult, and thus interprets NOTNEWS so liberally as to be simply redundant to NOTE (which is the complete opposite of what is meant to happen - NOTNEWS is meant to trump NOTE).
The ongoing wars with WikiData illustrate their absolute horror at the idea anyone but Wikipedia could be the go to repository for semantic data. Using the laughable excuses that Wikidata doesn't have the robust and effective policies Wikipedia has to ensure data is correct, non-harmful and neutral (stop laughing), they are rejecting all attempts at interconnectivity.
Unsurprising then, that all these projects and up working quite differently to Wikipedia. The WMF needn't have even bothered including English Wikipedia in the unified login system, there will be very little crossover in the populations, and those that do will largely be either global functionaries or bot monkeys.