Concerned? Here is how my server is started:

writefreely > /dev/null

This means that the only person who would be able to see the logs would be Yog-Sothoth (praise be upon him).

Perhaps you should be using something to block trackers – it usually speeds up your online experience.

I would be more worried about your ISP. Also, if you're in someplace like Australia, America, Canada, or the UK, it's worth looking into something called the Five Eyes.