During the last month I have collected edits done with Visual editor which went wrong because the user do not really understand how to use it. I tried to filter out pure vandalism, but I am sure that this list still contains a few cases.
Most of these edits are from IP-Adresses, however two of them are from Users which are admins and these are usually experienced users.
All of them seem to happen, when a user simple clicks at a wikilink and starts editing, ignoring the popup dialog for the link. And this ends up with a text not matching the related wikilink. (Disclaimer: I just guess what the user might have done, for my edits I do not use visual editor, so I have no experience)
**Since we cannot change the behavior of the users, we need to change the behavior of the editor!**
Maybe it is enough not to split the link-text and the link itself when a user simple overtypes a wikilink?
The accidents with dates/years can be found with a regular pattern, but cases like this one:
https://de.wikipedia.org/w/index.php?diff=175624107 are hard to find, I actually have no idea how to find. Please note, that the diff shows two old accidents where with [[Viertaktmotor|Zweitaktmotor]]