Now, what I'm not sure about and don't have the means to consult a lawyer about is 1) How liable is the author of a scraper who put it on GitHub but never did

Now, what I'm not sure about and don't have the means to consult a lawyer about is 1) How liable is the author of a scraper who put it on GitHub but never did use it themselves. Because I remember seeing a lot of implementations and tutorials of tools like BeautifulSoup that don't necessarily comply with the ToS. 2) What if you edit the User-Agent to something that resembles a browser provided the scraper is just substituting browser interaction, e.g. those search from your terminal applications. Could/would it be construed as impersonation or something?