I've re-opened a couple of the questions asked by those possible sockpuppets, not because I appreciate these machine-gun etymology questions, but because the reason given is usually "off-topic: Language-specific grammar and usage questions are off-topic unless primarily concerned with linguistics rather than usage".
These questions are primarily about etymology, which is definitely part of linguistics, and they are generally about the relatedness of words in at least two languages, so I think it's a bad precedent to consistently close them on those grounds: well thought-out (or even half-well thought-out) etymology questions should be allowed in my opinion, and I guess the reason this closing reason is chosen is that they are allowed as there isn't a closing reason that is actually appropriate.
It's possible to vote for closing a question as "other" and then add a comment. Some comments have mentioned there seems to be an almost complete lack of research behind this question (and I'd say the poster is basically picking pairs of random words that sound vaguely similar and just asking ahead), so maybe people who want the questions closed should simply give a reason of this sort.
Does it even make sense to close them in the first place, though? If the questions are on-topic and would generally be appropriate for the site, except for the fact they're machine-gun questions of an identical type that show no prior research and are posted by apparent sockpuppets, then to me, it makes more sense to downvote the questions to death, and hopefully manage to ban the sockpuppets.