:: You probably noted that:
 No 3RR infringement exists (edits are spaced).  
 The dispute is on the "Disputed" tag itself, not on the content. And the page you mentioned clearly states that templates should not be used on other templates. Meaning that the dispute tag should be discussed here.  
 User:Dahn is pushing the idea that an article hee deems incomplete must be tagged with "Disputed" even though he is not willing to contribute. Therefore, there's no edit conflict.  
 This is why I consider his edits as vandalism.