There is currently an open question on ELL which has raised some completely off topic argument in the comments some of which are becoming unpleasant. One contributor is saying you shouldn't answer questions unless you have a deep knowledge of linguistics or are a grammarian. And two others, including myself, who maintain that, for English Language Learners you do not need such a specialised knowledge, but be fluent in English (probably a native speaker) and fairly widely read so you have a good vocabulary and a broad experience of written and spoken English.
I know one prolific contributor who is, I believe, a retired engineer like myself. He is highly rated and could, IMHO, become a moderator if he so desired. Other regular contributors include teachers, but none whom have specifically identified themselves as linguists.
What do you think? Should only linguists and grammarians answer questions on ELL? Or are we trying to help students of English by using our years of practical experience and a general education?
5 minutes later
I've just gone back to the question on ELL and most of the nastier off-topic comments have been removed along with our responses. But this doesn't change this question.