Forum Moderators: open
If it's a key phrase, and can be legitimately broken up and then interspersed across the content, Google's OK with that.
I see a lot of blather re: keyword incidence in the forums; At the end of the day, Google still likes the keywords (sparingly) in the title, legitimately in the "description" meta, at the beginning (top) of the page and again at the bottom, preferrably via alt tages or title tags.