Would it be bad to discuss my ideas with the public, in a blog?

seven_70 asked:

I have a lot of ideas for products to invent, businesses to starts, etc. Would it be bad to discuss these ideas with the general public to gauge the interest and to get some input from others? For some of my ideas, I already have secured the URL, so I don’t care if someone copies it because I have the URL that I want to market the idea under, if that makes any sense. Otherwise, as an indivudual, how do you do this kind of market research without giving out too much info?