Simply getting a few emails offering help to promote his book isn't weird - posting about him trying to befriend her on the open forum when he hadn't IS weird. I guess the latter made him question the motivation for the former and made him suspicious.
They weren't just your run of the mill emails though, were they?
One of Jeremy's most loyal and pro active supporters had made quite an extraordinary offer. Could Harrison have resisted the temptation to include this information when he sold his story to the paper?
What was his motivation for going to the papers, do you think?