That's a good tip for safety conscious visitors because the webshop is in the same country. Probably a good idea to put it on the event wiki. Is the event still going on?
The last day will be this Tuesday.
I rather use Cyberchef, it’s open source, runs locally (browser client-side) and supports a gazillion encoding/decoding/hashing options.
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It's a strange feeling to be aware that you're in a dream. I've never really managed to get complete control of the dream.
But I do want to point out to people that https://github.com/domainaware/checkdmarc exists for quite a while. I use it often and have also integrated it in various automated tooling.
(It also does not require handing out email addresses to strangers.)