Clickbait works via a phrase, quote, or other mechanism to reach our concious mind and get us to click, hoping to know more. "Injecting" this phrase directly into someones head would result in three things(that I can think of)
1: The reciver sees it as an actual thought of theirs
If this clickbait phrase doesn't come with some sort of marker to show its an external thought, the person reciving it might think of it as their own, and expand on their own. For example, say someone recives the title "8 ways to remove demons from your house," the person may begin thinking of three ways to remove the demons. If that action leads to them unknowingly expanding on it, and getting the article, it could be considered intrusive. Additionally, this could be a way of "brainwashing"people, by implanting thoughts into lots of peoples heads.
2: The reciver sees the title as an external source
Maybe the clickbait sent is recognized as an external thought, like ones read or heard, a similar thing could happen as above. Or the reciver trains themselves to tune out the titles, and ignore it.
3: The reciver learns to filter the titles
If the titles sent are marked as an advert, the reciver could train themselves to filter through the titles when they want to, similar to popping onto social media and scrolling through articles, choosing to read only the ones you want.