When you look at "members online now", it says the members, guests, and robots. What are the robots? 

"bots" are also used to scrape (copy) content to be used on other websites without permission, slurp up email address for use by spammers, and to probe for security vulnerabilities to hack.. So they are also used for bad things..
There are actually (approximately) 10000X more 'bad' bots roaming the web than there are 'good' bots..
My response was to the other comment that "bots do no harm", (or something similar...)...
The OP specifically refered to the "Members Online Now" section, at which time I checked and there were 52 Robots listed and my response was to that specific query. It was not a technical tutorial on email harvesting, security vulnerabilities, key mapping, database excavation, or any other nasty which does not enter through the front door and so avoid being counted in the census.
The 52 listed were Google 14, Bing 12, Yahoo 7, Baidu 19. All of which are recognised search engine bots, the last one being the main search engine in China.
I apologize if my post has, in any way, reduced the quality of your life and am sorry that you had to take up so much time and energy in your response.
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