You are so right Silverdragon, it's only up to the discretion of the US Consul to approve or deny your application for a visa. I think, fraud only comes in when you are giving false statement, information and documents with the intention of acquiring a visitor's visa to look for a job or of staying in the US for good; but paying someone to assist you to avoid hassle is another story since still the applicants themselves will be in-line doing the interview. You can check out the internet to see it yourselves, there are really legal services being offered that will hasten your application for a visa only it will cost you thousands of bucks, and such services of course are only for the privileged ones; i mean if you can't afford for the service fee then do it yourself, downloading the application form, setting an appointment, etc.
One more thing for the information of those who find wrong in me acquiring a visa with an extra effort, an approved visa on your passport still does not guarantee entry in US. Still you have to prove to the interview officer at your port of entry your clear intention in getting in the US and if you are financially able to support your entire stay. What i'm implying here is the importance of money which is my means of extra effort in getting a visa and enjoying it.