Are you using Google Search each time though? if its not happening to every user using the forums then it cant be the forums, its too small an amount of people reporting it.
Those that have reported it (from what i can see) say its done from googling Honourbuddy, and on the Chrome screenshot of yours its a google search that has landed you on that page.
Have you tried just bookmarking the "www.thebuddyforum.com" address and loading from there?
I have never had a redirect since i started using Hb, i know i havent been using it for ages but surely i should have seen at least one if it was the forums. I never google Hb though i just use my speed dial in Opera.