Ask HN: Do site specific browsers violate Terms of Service?

I've built a site specific browser app on the Accelerator Titanium platform for craigslist. Ti is free and easy with it's ajax requests which allows me to grab CL content, rearrange it and present it as kind of a CL feed reader on steroids. That said, I'm trying to be a kind as I can with the requests I'm making to CL.

I know CL has shut down plenty of websites that attempted to profit off it's interface shortcomings. Do you think I can expect selling an app based on their site to be any different?

My fallback plan is to consume only their RSS feeds vs. scraping the site. I'm assume that's easily above board?