I'd like it if Proton would make a version of the Captcha-style verification or human verification that allows the use of audio instead of only the image challenge. I have had a concern that the images would eventually include photos of women with immodest clothing. Blocking images by default because of the very immodest ads online today is a good strategy but if that has to be switched off to do a human verification, then the shield is down. I haven't had any concerns about the images Proton or whatever verification company has been using. But the risk seems to be that the nature scene could easily turn into a nature scene with people hiking with any immodest clothing, etc. A free PDF handout on being careful about guarding the eyes is here at the Fliers page of my site: https://insultingconsulting.net/fliers.html
Thank you and G-d bless.