Domains By Proxy review: Domain shadowing

I am the organizer of charitable events conducted under the "newly" registered names StPeteCarShow.com and StPeteMotorClassic.com. Under our going forward plan we intended on registering StPetersburgCarShow.com and StPetersburgMotorClassic.com. On examination both those domains have been recently taken by DomainsByProxy. It is clear they have trolled any domain that uses the shortened name and then registered the full name for themselves, which is on offer to buy through (guess where) GoDaddy. They have no intention of using the names themselves and they are very localized and specific. In addition to this, after we registered the original domain I was spammed to hell, with my name and contacts being sold to whomever thought they could sell me something, the premise is that I should buy their Privacy Service. They have done similar with xxxNYC.com and xxxNewYorkCity.com.