[gkurtz1]

This seems to be very clearly against Facebook and Twitter's terms, unless they are given permission:

Facebook: "You will not collect users' content or information, or otherwise access Facebook, using automated means (such as harvesting bots, robots, spiders, or scrapers) without our permission." - https://www.facebook.com/legal/terms

Twitter: "You may not do any of the following while accessing or using the Services: (i) access, tamper with, or use non-public areas of the Services, Twitter’s computer systems, or the technical delivery systems of Twitter’s providers; (ii) probe, scan, or test the vulnerability of any system or network or breach or circumvent any security or authentication measures; (iii) access or search or attempt to access or search the Services by any means (automated or otherwise) other than through our currently available, published interfaces that are provided by Twitter (and only pursuant to those terms and conditions), unless you have been specifically allowed to do so in a separate agreement with Twitter (NOTE: crawling the Services is permissible if done in accordance with the provisions of the robots.txt file, however, scraping the Services without the prior consent of Twitter is expressly prohibited)" - https://twitter.com/tos

(edit: typo)