That was at times of DES. Cryptography that is used today is proven to be complicated enough that it’s unbreakable unless the government got quantum computing working at sufficient skale.
Like others wrote, attacks will happen when the messages are received and decrypted.
They can be upset. As somebody seeing the post on the all-channel, it’s strange that they start and finish the post with pointing out the lead dev when there is no clear sign that he is involved.
You could try to change the browser ID string that is sent with every request.