Do you think retargeting jacking is unethical?

[Kurt]

'Retargeting jacking" is when you post a redirect link that includes adding a retargeting pixel.

For example, you post a link on FB to an article on Forbes.com. Someone clicks on the link, but instead of being taken directly to the Forbes article, the link sends them to a script that adds a retargeting pixel then forwards the clicker to the Forbes article.

This lets the person on FB that created the link to build a custom audience from their pixels that are interested in topics like the Forbes article.

Unlike typical link jacking, retargeting jacking doesn't steal the authority or opinion of the destination site or put that site in frames. I don't think there's any issue here.

However, is it unethical to add tracking pixels to the people interested in article you posted without them knowing for you to market to in the future?