It is best to put the actual domain names up, and invite comments.
Nobody can steal the idea, if you have registered it. The worst that can happen is that someone might develop a similar domain in a day or two, and "steal a march" on you. If it is a good name, that advantage can be killed in a few days.
If you are trying to sell a dead horse, the least you will get on THIS board is the address of Pedigree Petfoods in Melton Mowbray.
99.9% of Acorn members are straight as they come, although some would argue that they are straighter than that (with extraneous words in an "unco tongue" if it's FagEnd, or two pages of potty rhetoric if it's RedKite).
Nobody wants to publicise their ideas to the www and give them away for nothing, but registered means protected ...