I think it depends on the reliability of the source, but I’m tempted to say as long as it’s appeared in the proper media it can at least be posted, but a little common sense required when judging how reliable it is. With El Nacional above I’ve no idea, although I did see a comment online that they’re quite unreliable.
But for the sake of argument let’s say leave the obvious fake ITKs and Anfield Edition out of it, instead posting the links to the actual media report instead - and people can judge for themselves how reliable that source is.
As for the OP, I think ITKs are already covered in the last paragraph, and sites like Anfield Edition covered in the line about rumour aggregator accounts.