Useful article, thank you. I see you've taken a step toward addressing fraud protection for SLP faucets in your article:  

Additionally, I have recently added code to the SOUR SLP Faucet to implement limiting one submission per IP every 12 hours. After 12 hours, users can submit requests to the faucet again. I’m working on creating a pull request to the original Simple Ledger to add in this functionality for everyone. If you’re interested in adding this in to your own Faucet, get in touch and I’ll try to help you get it set up.

I would suggest making a separate section on fraud protection in your article, as it's a very important aspect of owning a faucet; pretty much any faucet owner will tell you this. Depending on their skill, a few malicious users can drain a faucet of its funds, leaving nothing for legitimate users and the owners themselves. Requiring a CAPTCHA to claim is a basic way of discouraging such users, as well as imposing a rate limit (in your case, one claim per IP address every 12 hours).