Ideally, I'd expect an attempt to citoid[1] a link to Wikipedia to helpfully suggest that the user just turn it into a normal wikilink. Instead I get from:
https://en.wikipedia.org/wiki/Victor_Arnautoff
<ref>{{Cite journal |title = Victor Arnautoff |url = https://en.wikipedia.org/w/index.php?title=Victor_Arnautoff&oldid=639070838 |date = 2014-12-21T18:19:40Z |access-date = 2015-04-08 |language = en}}</ref>
Which is a totally invalid date and throws a warning (though it does try to do the right thing about citing to a specific oldid!)
(Probably not a common case, but figured worth noting.)
Harder, related, even rarer case perhaps worth noting: I found some "citations" today that are direct links to a PDF uploaded on wikisource, e.g.,:
<ref>[http://upload.wikimedia.org/wikisource/en/d/d2/ChurchB6_2_Beginnings.pdf]</ref>
I don't think I can expect citoid to handle a raw PDF, but maybe upload.wikimedia.org should be special-cased?
[1] What is the verb there anyway? :)