It seems like everyone is climbing onto the negative rake scraper bandwagon but, frankly, I just don't get it. I use scrapers all the time and get really good results with nary a catch. Perhaps that's because I grind mine at 85 degrees. I mean, by adding a "negative rake" to your scraping edge you're essentially making the grind angle steeper.

When I want to make the edge a bit steeper (effectively exposing more of the burr to the wood) all I need to do is raise my tool rest.

Somebody throw out a nugget of wisdom to convince me otherwise.