it might have happened to a few guys but as more guys do it the better it's going to get and the more places one can get it done the cheaper it is going to get. Plus as more and more doctors see a market in these new penis implants it will make them want to make their own.
And as soon as the market develops, vultures ... er ....lawyers will get on TV and encourage the dissatisfied to sue the shit of the Doctors and kill the procedure. Back in the late 80's - mid 90's, the feminazis and lawyers almost killed the silicone breast implants with ridiculous lawsuits and outright lies which the media propagated. Then a Harvard medical study in 2006 exonerated the implants but the damage had been done. That is why Wendy Whoppers could get 3,000 ccs silicone implants in the early 90's but now thanks to the FDA and the fact that Dow Corning was essentially driven off the business by lawsuits, if you really want to get big, only saline expanders can be obtained.
So if you dream of getting a 16" cock with a penile implant, forget it, it ain't gonna happen.