You're going to need to explain how scraping publicly available information on a website is theft.
If information is your competitive advantage maybe you shouldn't have it on a publicly accessible website, and should instead stick it behind an API with pay tiers and a very clear license regarding what you may do with it as an end user.
Note, a simple sign up being required to view a website makes it not publicly available information any longer and you can cover usage, again, in a license.
Then you have a whole bunch of legal avenues you can use to protect your work. Assuming you can afford it that is.
If information is your competitive advantage maybe you shouldn't have it on a publicly accessible website, and should instead stick it behind an API with pay tiers and a very clear license regarding what you may do with it as an end user.
Note, a simple sign up being required to view a website makes it not publicly available information any longer and you can cover usage, again, in a license.
Then you have a whole bunch of legal avenues you can use to protect your work. Assuming you can afford it that is.