So you think that whitewave doesn't know the source of all those tweets she puts on?
No, not at all - that's not what I'm saying. It's the people reading the links who have the problem. Of course, the poster knows the source. The problem is no one else does - especially when it's preceded by a comment like 'more evidence'.
It's meaningless. I'm sure people are nervous of reading the links, especially if the poster says they're not technically literate. No one wants to click on what looks like a dodgy link.
To say that someone cannot reference a source because they are unable to cut and paste a link is not reasonable. You can always type 'From Twitter - @Whoever A Sunday Times Journalist' for example.
Then if people want to see the context, they can find it.
The issue is very much like fake news. There are so many bots on twitter and there's no way of knowing what you're actually looking at when all you have is an image with no context or source.
I think people would be less nervous about clicking the link if they had an idea of where it was taking them. It helps the conversation if people know posters take care and only link to reputable sources.