[Air-L] Ethical problem in a Twitter reaserch

Dear Air-L Community, I have encountered an ethical problem which I am sure I am not the first to encounter and so would appreciate your say on the matter. I am doing a discourse analysis on a twitter hashtag and I have no way to discern that I am not using under age (under 18) users tweets. As there are completely different questions and guidelines to research minors from an ethical perspective, I was wondering how other people have dealt with this problem in their research? Thank you, Lior Beserman Navon, Ph.D. Candidate The Department of Sociology & Anthropology The Hebrew University of Jerusalem