Fact is, if everyone thoroughly researched everything before posting...they wouldn't be here!
This is called a discussion forum.
I thrashed hell out of Google, emails, phone calls, letters, interviews, FOI requests, libraries, bookstores and still came here for discussion.
If someone posts something that seems uninformed or unresearched...don't flame them, encourage them and point them in the right direction....they may come back to you later with something you didn't know, or do as many do, use it as an excuse to mount the podium and demonstate the exuberance of their verbosity on the topic.
Of course, if they are plain stupid, ignorant or rude...reach for the flamethrower!
At the heart of science is an essential balance between two seemingly contradictory attitudes--an openness to new ideas, no matter how bizarre or counterintuitive they may be, and the most ruthless skeptical scrutiny of all ideas, old and new.
This is how deep truths are winnowed from deep nonsense. -- Carl Sagan