You can create a blog, post on twitter or even join a university, spend 7 years studying and learn how science is done.
But what if you want to post here? I propose three tests
Can the "theory" be broken down into small chunks that can be asked about?
Can the question chunks be answered?
Are you willing to change your mind?
If it fails the first, it is too broad.
If it fails the second it is primarily opinion based.
If it fails the third it is a rant, not a genuine inquiry.
I think the universe is powered by electricity, what do you think guys?
Is not an acceptable question It is unclear, too broad, and posed as a discussion point.
Also unacceptable is:
Could gravity be a form of magnetism?
(It is unclear what that question means.) However, questions that may be posed by Electric Universe theories can be asked:
What causes the temperature of the sun's atmosphere to increase away from the photosphere and not follow an "inverse square law"?
Is perfectly ok, providing you are happy to accept that there is now a good explanation for this and can accept that this is no proof that the sun in powered by an invisible arc of electric plasma.