two things:

1) site.invalid

Can't you just edit the .php file and put whatever you want?

I don't like it when people put their URL, in fact, I have been thinking of removing that option (haven't implemented it yet). It tends to lead to spam.

2) Privacy - all my own sites have had a privacy, disclosure, cookies and comments page starting 2007. Any new sites got those pages automatically.

Can't people just use the contact page on any of my sites to ask me to delete all the data?