I am a user of different stack exchange sites. I know it is not only good manner but also kind of policy: to ask but also share the knowledge and provide the answer for others. I know there is a phrase "question vampire" about people who ask questions, although the questions are often of low quality. In some cases the account can be banned and an account holder can't ask questions anymore.
The ELL site is for people who learn and English is their second language and often do not feel confident enough to provide the answers.
Is it ok to be a such user and (for sometime, probably years) ask questions and do not answer questions of others. Is such account in a risk of ban? If yes is it the way to enjoy the community but be full legitimate user?