You have an interesting concept of off-topic abuse.
I have just scanned through your post in speakers corner where you admitted yourself that your original post were "ramblings". I can't see that the FE's post was abusive, rather commentary on your original post.
To answer your specific question there is only one (as far as I'm aware) F.E. As to how you report him (to whom do you wish to report him and for what?), I'm afraid I don't know.