Can anyone tell me how to log/ block IP addresses or give me links to tutorials of such? Thanks ahead of time.

I wrote this just for you ;)

http://www.lissaexplains.com/html6.shtml#block

If you want a remote hosted ip tracker, try these:

http://cgi.resourceindex.com/Remotely_Hosted/Logging_Accesses_and_Statistics/

If you want one that resides on your server, and you have php try these:

http://www.hotscripts.com/PHP/Scripts_and_Programs/Web_Traffic_Analysis/index.html

If you want one that resides on your server and you use cgi try these:

http://www.scriptsearch.com/Perl/Scripts_and_Programs/Web_Traffic_Analysis/

Fun! :) I didn't know we could do that! Thanks!

That helps, thanks. Now I just need to know how to find out the IP of the person who is causing trouble. Am I correct in thinking I must use PHP to do this?

You can use your existing stats program ( I have one with Dreamhost ) or you could use a remotely hosted one. You can also use a php or cgi based stats program.