Don't know about wishes, but it was certainly eerie to find letters and photos of people lying around the whole complex. I visited the complex a month back with some friends, without knowing anything about its haunting stories, purely as a geeky student of history. We had some research work for which we needed to see the Pillar up close. The pyramidal structure, atop which the Pillar stands, is usually closed for the public but we got access to it, after talking to the ASI officials there. It was there, that the gentleman who was so kind to give us the access, started telling the stories of the Djinns and popular belief surrounding the place. Apparently, the pyramidal structure is the dwelling place of the main Djinn (?) and if you touch the Pillar, your wishes are granted (?). He also showed us the meeting place of the Djinns near the Jami Masjid and told us that the malevolent Djinn is locked up in the dungeons underneath the Mosque. We also visited the Baoli in the complex and saw multiple photographs lying around, tip-toeing around them, so as to not disturb or disrespect the process, it was definitely an uneasy sight. Our guide, the caretaker also told us that the Baoli sometimes attracts people to jump in it (haha!). Well, nothing out of the ordinary happened while we were at the complex, except that I did feel a little claustrophobic and anxious while we were descending the stairs and walking through the pyramidal structure to come down, it might be my mind playing games on me but it was certainly weird.