Hay @worldfinances and sorry for the late reply :(
I do not see the problem here: I mean it should be crystal clear to everyone that those people offering the services are no Robin Hoods or heros - They just want to earn money with their service. It is great that you show new users that using those services can be a bad deal, but in the end they simply need to understand this and stop using those services.
The only technical solution would be to disable the curation reward using a comment_options_operation - This is not possible through the Steemit.com UI, but can be achieved by using a library like SteemJ.
While saying that I also have a bad feeling about it because disabling the curation reward would also mess up the whole system Steem is based on - I mean the most people here do not like a post because it is just good - They expect that a lot of people think the same and that they earn a good curation reward in the end - So disabling the curation reward could also have a huge negative effect for the author.
Hope that helps a little bit ..
Best regards!