Why are there so many whackos using the internet?

I was fiddling around with the config of my blog today and noticed you can get an activity log of entries added and search terms used. The following are some of the keywords entered into the search thingie in my blog:

'arvrillavinge-i'm with you'
'sex'
'porno'
<lots of other sex-related entries from the one ip address snipped>
'movies'
'kazza'
'vodafone credit codes'
'free top up codes '

the last two and avril lavinge make me wonder the most. Like, isn't it *obvious* that my page is a blog?? And I don't even have any entries even *remotely* related to those search terms.

People are weird!