I think that the push-back you are getting may have to do with the fact that you ask a lot of questions of this type. Of the 41 questions currently marked as reference-request on the site as a whole, 19 were asked by you over the last few months, and you've only accepted an answer on one of them. These are also nearly half of the questions that you have asked.
So far as I can see, this site is generally an excellent source for informed opinion, and people will often provide references voluntarily if they have them readily available. Moreover, many of your questions (e.g., on visit weekend weather, or on ESL vs. conference acceptance) draw good answers that are not references.
Insisting on references only when good informed opinion is available can make one wonder about the motivation. Are you asking the site to "do your homework" on literature searches? This can feel especially dubious given that you work in large-scale ML / data-mining, and a lot of your questions are for information where, if a study exists, it would likely be generated by one of your colleagues in the field.
So: is there a reason that you really need to tag so many of your questions asreference-request? Are these questions out of curiosity, or are you trying to use the answers to formulate research questions or related work sections of your own?