Losing People reading just a thread and leave

[symptome]

Hi!

I am asking myself, if I shouldn't change the footer of showthread.
Shouldn't there be links to the forum and the forum-home?

I believe, that most of the people are coming through search-engines and land directly in a showthread and not on forum-home.
And I believe, that they read a thread and miss all the links in the header (for forum, wiki, chat and more).
They will read till the end of the thread and then there's the point I should get them a big sign where they can chose to go back to the forum or forum-home.

What do you mean?
Has anybody made something like that?

Marcel