For getting faucet, you should pass the captcha. I don't think bots are able to pass captcha. So, abusing the system is not as easy as you think.
This is what person not very familiar with faucets will say. All faucets have captcha, but they are struggling to fight with bots. These abusers are smarter than many of you may think. I don't know how exactly they are doing this dirty job, but captcha isn't always a problem. Faucet owners (including Freebitco.in) must add much more security features and it still can't protect faucet 100%