Amanda Welling shares a screenshot of author's discussing "trolls," where it was reveled that several authors are collecting readers' personal information, via Book Giveaways, into a spreadsheet to "track and identify trolls."
There's no indication of what they plan to do with this informations, but the fact that none of these authors are respecting the privacy of potential readers is worrisome enough.
Whether you believe you're one of the "trolls" being targeted is beside the point, everyone should be concerned, if not outright pissed. The personal information of ALL the participants in these giveaways is being shared without their permission.
Not surprising, GoodReads has absolutely nothing safeguarding privacy of the participants' personal information in the Terms & Conditions of their giveaways.