I have a guess about what "pro-active" means.
I think it'd be reasonable for Randi to abandon the "open" challenge altogether. The whole point of the million dollars was, as I see it, a) to draw out professional charlatans and take away their obfuscation and excuses, and b) to put a big, public, flashy face on skepticism. The way I've seen the challenge proceed over the last year or two---with Kramer and Jeff muddling through long negotiations with the mentally-ill, the ill-informed, and idle fooling-around teenagers---hardly seems to advance any of these goals.
A nice way to proceed might be to have---in addition to ongoing, "proactive" needling of public charlatans, "Grand Challenge Days" for the man-on-the-street. Randi might set the rules---most people, after all, fall into three or four simple types of test---and invite open applications, for annual competitions. Test dowsers one year, astrologers/readers the next year, and ESP applicants the following year. A single test protocol could be announced; all applicants could be invited to show up at the same place, or he could take the show on the road. It'd be great publicity---both in the educational "Look, everyone, ESP doesn't exist" mode, and in the anti-charlatan "Sylvia, dozens of psychics have agreed to next weeks' simple test: why won't you?" mode.
This would exclude the one-of-a-kind cases---the "egg detector", the "I materialize bits of trash by rail lines"---and people put off by the travel. And it presumably means less entertainment in the forums. But I can see it appealing to JREF, and carrying out its mission better than the status quo. Heck, taking the Challenge on the road would be a great reality show. "American Psychic". "America's Next Top Dowser".