genuine guests?

[mammu]

In my forum it shows so many guests but are those really genuine ones?

When I look into my currently active users, in user names it shows guests but in IP Addresses it shows lj511261.crawl.yahoo.net
What does it mean? Is it spider or guests?
Check out attachments...

Also why are there so many Yahoo! Slurp Spiders (829) and just 1-1 Google Spiders (1), MSNBot Spiders (1)?

 

[ffrstar777]

they're just spiders crawling your site
not ure about yahoo and google, but i get more google bots on my site than yahoo ones

 

[.v0id]

I remember times, when I did have even 100 yahoo bots crawling my site within 30 minutes.

 

[ryu]

crawl.yahoo.net-- that alone explain it all, it's all yahoo bots crawling your site.