> What if the user scrolls past the last paragraph read, just to skim over the content. Later when the user returns, where should you position your page?
When scrolling, the paragraph could fade in a message to bookmark that spot with a click function.
> Returning user after 2 weeks, will he/she remember where they left off? Are you going to make them scroll up?
There could be a time limit set so that the users session is deleted?
> TOC would be a better solution.
I agree. Just a random thought I had today.