11. For a system comprising at least one server with a processor and non-transitory computer-readable memory, a computer-implemented method for automatically assessing website credibility, the computer-implemented method comprising: classifying by operation of the processor, each website of a plurality of websites based on subject matter of the website; identifying by operation of the processor, a group of credible websites from a set of similarly classified websites; detecting by operation of the processor, a common set of visual elements presented in the group of credible websites; determining by operation of the processor, a range of attributes defined by the group of credible websites for presentation of a particular visual element of the common set of visual elements; defining by operation of the processor, a credibility scoring rule quantifying credibility attributed to the particular visual element based on usage of the range of attributes by the group of credible web sites; identifying by operation of the processor, an attribute defined for the particular visual element of a similarly classified particular website that is not in the group of credible websites; and computing by operation of the processor, a credibility score for the particular visual element of the particular website according to the credibility scoring rule, the credibility score rule outputting a first score connoting increased credibility when the attribute for the particular visual element of the particular website matches an attribute specified for the particular visual element by a threshold number of credible websites from the group of credible websites and produces a second score connoting decreased credibility when the attribute for the particular visual element of the particular website is not an attribute specified for the particular visual element by any credible website of the group of credible websites.
11. For a system comprising at least one server with a processor and non-transitory computer-readable memory, a computer-implemented method for automatically assessing website credibility, the computer-implemented method comprising: classifying by operation of the processor, each website of a plurality of websites based on subject matter of the website; identifying by operation of the processor, a group of credible websites from a set of similarly classified websites; detecting by operation of the processor, a common set of visual elements presented in the group of credible websites; determining by operation of the processor, a range of attributes defined by the group of credible websites for presentation of a particular visual element of the common set of visual elements; defining by operation of the processor, a credibility scoring rule quantifying credibility attributed to the particular visual element based on usage of the range of attributes by the group of credible web sites; identifying by operation of the processor, an attribute defined for the particular visual element of a similarly classified particular website that is not in the group of credible websites; and computing by operation of the processor, a credibility score for the particular visual element of the particular website according to the credibility scoring rule, the credibility score rule outputting a first score connoting increased credibility when the attribute for the particular visual element of the particular website matches an attribute specified for the particular visual element by a threshold number of credible websites from the group of credible websites and produces a second score connoting decreased credibility when the attribute for the particular visual element of the particular website is not an attribute specified for the particular visual element by any credible website of the group of credible websites. 12. The computer-implemented method of claim 11 , wherein defining the credibility scoring rule comprises defining increasing scores for attributes in the range of attributes that are specified for the particular visual element by a greater number of the credible websites.