Jorge is dealing the straight goods! (meaning he is very correct - for those of you who do not speak fluent hipster [yet.]) Defensive publication is fast and cheap and gives the idea broad "protection" in your inverted sense of protection from privatization via patent. It will have worldwide impact no matter where you publish as long as it is a public pronouncement. Making plain how it is done is vital and you might also, in the disclosure, list any alternatives you can think of to broaden the scope of what you are disclosing.... What is it? You get to be one of the rare participants in inventor circles who can just blab all they want, so go for it! (however...)
A thing to think about: Assuming it is useful, have you vigorously assured yourself it is novel? If you don't do some diligence on that front, you risk inviting people to practice an invention not your own. If they infringe, you are not likely to get in trouble (statement of odds and an opinion so worth $.02 MAX) BUT you want to be a help to the users of your invention right?
So the service of making sure it is yours to give away could mean:
1) more research into the prior art
2) actually obtaining the patent and sharing it (per above)
If you have a budget for the patent and have done the prior art search maybe it is time to spend a part of that budget with an attorney to figure out the best and most money/time efficient method of committing it to the public good. One of the things that makes it hard to prescribe a particular position is that different fields of invention behave differently. Some are very complexly staked out and full of ferocious litigants. Others less so and so on. Attorneys don't bite. Find one and layout what you want. Good luck