I've botted with RiD for over 3100 hours, Earned 13 99's, 12 of which on my main, been reported over 40 times that I've witnessed, probably more when I'm not at the computer. I've even witnessed my bot be reported by Player Mods, and I've never been touched with a single macro offense.
I'm close to reaching "Lots!" on my experience counter, which is after about 214mil exp reached on your experience counter, all of which was from botting with their bots.
To give you some solid statistics on their banrate: since the bot was brought to it's current level of undetectability in August 2008 there has never been a ban following these Guidelines:
http://www.robotzindisguise.com/Guidelines.htm
Breaking Guidelines since August of 2008, there's only been 37 bans, and that's with over 600,000 (as of 2011) hours clocked across 12 bots.
There have been no bans, even out of the Guideline breakers (8-14 hour a day botters) and Suicide Botters (15-24 hours a day), since Bot Nuke last October.
As far as safety goes, I'm not worried at all about breaking Guidelines all the way to Max Cape with RiD (RiD has said he intends to make a bot for all skills eventually, yes, even a dung bot).