The consensus seemed to be to contact the editor on the talk page for clarification if needed.
well, that's the problem, isn't it? i mean, how can an article about
Einstein have no sources, unless the general attitude is that having no sources is not an issue, or at least not one the casual reader can see. It harms credibility of the whole dutch wikipedia to have so few sources in almost any article. The talk page is nice, but does not invite people to change stuff fast, whereas a tag on the article itself makes it clear that there need to be sources! Now people reading the Einstein article have no clue there's a source issue unless they bother to click on the talk page, which 99% of all readers probably don't.
Triggerhappy taggers are a nuisance, but tags can be removed if they are silly. Having pages about important people and things without any sources, imho, is just plain silly.
S.