As a forum admin and owner of several much larger communities we have opted to completely ban all mail.ru accounts and most IP ranges within the Federation of Russia. The reason is not that we do not want Russian friends or Russians posting, the reason is that the Russian Government refuses to assist in closing down electronic attacks from within their country. China operates in a very similar fashion. It is unfortunate because I have family in Russia that I had to choose to ban also since they were in the same subnet with dynamic IPs.
Just take a quick look at
StopForumSpam.com perhaps you might see a trend with certain countries?
As far as Quigley goes here are a few thoughts.
1. You will attract more flys with honey than vinegar. (Try being really nice)
2. Remember that your country never made large import orders of US cars so why would ford or a ford based business run out of their way to support a used vehicle purchase in a non supportive country from an upset mechanic? (I'm blown away that Larry even responded here)
3. Try to remember that regardless of number 2, Quigley is not focused in the business of retail part sales even in our own country. They convert vans and only until recently did they even offer to help with used vehicles. So try using more of the approach from #1