Professor I'm writing this under wrote a whole book about pornography (a very good one IMO), and fan-made pornography is one of the topics he don't know much about and didn't include there. One could say that I'm supplementing his work - and actually he was the one that pushed me in this direction.
Well, TBH, this survey is targeted towards people creating or consuming that kind of material, I was pretty explicit about that. With problematic kinds of NSFW, it's what question suggests, I'm interested what people see as most problematic, because of certain controversies present in the fandom and around it. And if they see all NSFW as evil, they can still express that - but if they do, they most likely aren't in the targeted group (though there are some exceptions). :] Same goes with other open questions, the way they're phrased may implicate certain attitudes, but if someone don't feel they apply to him, he can effectively challenge it in his answer.
I know it's not going in depth in all those issues, but it is only part of my study. I will do a pretty major content analysis and with the poll I was interested in seeing general tendencies, which I needed to interepret other things I'll be analyzing. I'm not a specialist in sexuology, I'm mostly interested in discourse analyses, and those basic characteristics of bronies involved in NSFW fanart are required for my work. At the same time, I find the data I've gathered extremely interesting, and as much as I know, it's more then anyone did before me on this topic.
Also, I wanted to keep the survey as short and user-friendly as possible, as I wasn't sure what responce I will get, and how much I can ask from people here before they will find the survey a boring chore. If I knew what I know today, maybe I would choose a more ambutious approach, but I have no regrets. I'm rather self-critical and I know how imperfect my work is, but the amount of answers I've got and their quality is absolutely amazing and I hope I'll be able to turn this contribution by poeple of the fandom into something worthy. You're right, that this is just basic data, but it's also extremely interesting basic data, that can be later used by someone willing to go deeper into certain issues. I'm trying to present a general overview of a phenomenon that is very poorly described in the litearature, I can only hope that someone will follow my lead and write more about it, hopefully deeper and better then I can.