Many web sites contain terms of service, where the web site puts a link to "Terms" or similar, and anyone who accesses the web site forms a contract with the web site operator under those offered terms.
Google operates a web crawler that accesses almost all web sites, including, generally, the pages that define the contract terms for accessing the web site.
Is Google Inc. forming contracts with huge numbers of web sites by accessing them while on notice of their terms of service? If not, why not?