I'd say that for a software developer specifically there isn't a particular second language that would be useful, as the lingua franca in the software development world is already English. Even in non-English speaking countries it is common to write code and documentation in English, converse in English, etc.

So if you want to expand your potential I'd say choose a second language that's generally useful. If you want to limit it to your own geographic area I'd say Spanish. If you want the largest possible expansion of your potential market I'd say Mandarin Chinese.

So from your own point of view, there is no way in hell such a thing as Slashdot can work, all those random comments from idiots who can't even RTFA!

Announcing that you are going to accept the contributions of homeopaths, etc. is like saying you're going to read Slashdot at -1 or accept every edit on Wikipedia.

Yes, a lot of suggestions are going to come from homeopathy and spiritual healers. And you know, then, maybe these people will learn more in the process than if they were being outlawed and chased by lawyers.

Hardly. Most of these people want to believe. No amount of rational argument is going to sway them. As they say: you can't reason somebody out of a position they didn't reason themselves into. Either that, or they are con artists.