Absolutely. Another is when they refer you to an entire two hour video rather than point a specific document or piece of evidence. One day, maybe the day before I retire, I’ll try that with a judge in a summary judgment hearing....
It seems like the more provocative the claim posted, the less chance that there will be a source, link, etc. provided.
Some woodchuck a couple of days ago posted that merely posting where a video can be found (in that case YouTube), was in essence posting a link to the video.