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    Look, I'll be honest. I didn't understand a lot of the things you said. I understand a few things , however, even before you said them such as you can't just copy someone's property. But I'm not asking about any kind of copying or stealing of property. I want to know that if I had a brand new search engine which I wanted to put out there to display results, do I have to get permission from the trillions of owners out there to crawl their websites or can I can i crawl their websites just the same and if they want privacy password-protect or whatever their websites for that? Please clarify.
    – user17346
    Commented Apr 1, 2018 at 17:12
  • So I can just put out my search engine and start crawling the websites and displaying their results without any worries? That's what you are saying, right?
    – user17346
    Commented Apr 1, 2018 at 17:15
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    @Kevin The worst that is likely to happen is that a site operator will ban your crawlers. If your site's results show significant copyrighted portions of other pages (e.g. images, verbatim text from the web site), the owner could claim copyright infringement and sue you.
    – Brandin
    Commented Apr 1, 2018 at 19:20
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    There have been ongoing battles over what content can be displayed in search results. Google has largely won the right to display copies of images from websites, but recently agreed to no longer off the full-resolution files in image search: arstechnica.com/gadgets/2018/02/… Also, beyond robots.txt files, a server administrator also has mechanisms to prevent crawlers from accessing their site, since having all your pages trawled on a regular basis by multiple bots can be annoying. Commented Apr 1, 2018 at 22:23
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    "Archiving and especially re-displaying someone's content is [...] not legal" Are you sure? This sounds like exactly what Google's cache does.
    – Laurel
    Commented Apr 4, 2018 at 2:15