Honestly, pick a proper open source license like apache to protect yourself (no-warranty clause) and your users (explicit patent and copyright grant).
Also, as you are latvian, under Wipo, you are essentially unable to give something away without a license due to the moral rights clause. I mean you can, but no one has a right to use it unless you explicitly grant it. You cannot disclaim rights and place it into the true public domain.
Thanks for the suggestion. I'll choose a better license! I agree that scraping is bad, but there was no other easy way to do what I wanted (the english improvement program that I talk about in the article), so I had to write this code.