The claim that they can embed software in an html link tag is false. They can’t.

Scare tactic.

The best they can do us come up with a unique arrangement of text with some other text representing a check bit that would be embedded in the article. Then you could write a robot that would look for those signatures for copyright violations.

That is the only way you could catch “cut and paste” of text with no link.

As for photos, you can alter bits within a photo, slightly changing the color values for the few pixels involved, and do that alteration differently for each copy you distribute. Then you can find from which source someone stole it from. AQ used a similar technique with JPEGs to embed messages in pictures to the scum that carried out 9/11.