Opinions. Advice. Lessons learned. Cautions and questions. Seems for every idea someone has, someone else puts a fence around it.
I'm not any different. Some days I stop myself from saying anything by silently asking "Do I need anyone to know that I think that?". (which is counter-intuitive to blogging, I know! lol)
Ideas thrive on butting up against other ideas. As long as you're not trying to stop an idea, but build on it - poke at it - turn it over, etc. then creativity will thrive with conversation and input. There is never just one answer (except maybe in math?).
That's really the criteria for offering those opinions and questions. Are you trying to start conversation or stop it?