When visitors leave comments on the site we collect the data shown in the comments form, and also the visitor’s IP address and browser user agent string to help spam detection.

An anonymized string created from your email address (also called a hash) may be provided to the Gravatar service to see if you are using it. The Gravatar service privacy policy is available here: After approval of your comment, your profile picture is visible to the public in the context of your comment.

You can control this, by having or not having a Gravatar account. When you created the account, you consented to other sites using your data to display your chosen avatar. Avatar or not, and which avatar, are under your control.


If you leave a comment on our site you may opt-in to saving your name, email address and website in cookies. These are for your convenience so that you do not have to fill in your details again when you leave another comment. These cookies will last for one year.

Embedded content from other websites

Articles on this site may include embedded content (e.g. videos, images, articles, etc.). Embedded content from other websites behaves in the exact same way as if the visitor has visited the other website.

These websites may collect data about you, use cookies, embed additional third-party tracking, and monitor your interaction with that embedded content, including tracking your interaction with the embedded content if you have an account and are logged in to that website.

You can control this, by being or not being a member at the external website. If you are not a member, all the external website sees is gibberish. You can control the cookie by allowing or restricting cross domain cookies. We recommend leaving this turned off, as it is in every browser at delivery.


We use Google Analytics and Google Tag Manager to analyze visits to this site. We do this, so we can identify 404 errors and to see, which content is popular. Your IP address is anonymized by Google, and (like every other tracker), you can prevent Google from tracking you by using the notrack features that are usually turned on by default in your browser.

We also use Matomo to collect anonymized, non-IP, non-cookie data. This data is used to find links into the site and eliminate 404 errors.

You may choose to prevent this website from aggregating and analyzing the actions you take here. Doing so will protect your privacy, but will also prevent the owner from learning from your actions and creating a better experience for you and other users.

Who we share your data with

If you request a password reset, your IP address will be included in the reset email.

How long we retain your data

If you leave a comment, the comment and its metadata are retained indefinitely. This is so we can recognize and approve any follow-up comments automatically instead of holding them in a moderation queue.

What rights you have over your data

If you have left comments you can request to receive an exported file of the personal data we hold about you, including any data you have provided to us. You can also request that we erase any personal data we hold about you. This does not include any data we are obliged to keep for administrative, legal, or security purposes.