You are running YaCy in non-p2p mode and because YaCy can be used as replacement for commercial search appliances
(like the GSA) the user must be able to crawl all web pages that are granted to such commercial plattforms.
Because YaCy can be used as replacement for commercial search appliances
(like the Google Search Appliance aka GSA) the user must be able to crawl all web pages that are granted to such commercial platforms.
Not having this option would be a strong handicap for professional usage of this software. Therefore you are able to select
alternative user agents here which have different crawl timings and also identify itself with another user agent and obey the corresponding robots rule.