I'm no expert at this but I am experienced (with RVM) and from what I've read I think that a lot of you who keep getting cursed out are just talking too much in your messages. I'm new to REI and have never run a campaign for it (yet).
But I have been involved in online marketing and other business opportunities for many years and I cannot recall one time being called back by a person who received a VM and they were driven to leave a nasty reply. (Voice Broadcasting, YES)
My personal opinion is that if you were getting responses, that's good. Perhaps you may need to refine your approach and say a lot less than what you're saying and try to get people to just call you back out of curiosity and THEN try to reach your end goal.
BTW... I was curious if any of you who've actually used Sean's service know round about how much he charges per RVM?
From my research it looks like he charges $800 per year.
There are actually many alternatives on the market that you can access for free. I guess if you have no idea what to say that you might need to pay for a script, but I'd probably try to eliminate that exorbitant fee.
Just my 2 cents...