I agree with NJ - straight people should be able to have a civil partnership as well, if they want one. Peter Tatchell campaigns for it!
And I find it odd that it most conversations about homosexuality, almost always the comment goes that it is abnormal, that heterosexuality is the norm - so if this is the case, why on earth- or more appropriately, what on earth is there to raise consciousness -wise?
I don't think we should be in the business of stopping them, if thats what they want to do, but you really do have to question the rationale behind the whole idea.