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this post was submitted on 20 Jun 2023
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Technology
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Nope. This is a huge accessibility fail. Any instance that has captcha enabled is locking out anyone even slightly low vision. Everyone should be manually approving all applications. It keeps instances small, and ensures that the fediverse remains distributed. Once we start having a spam problem, we should all just be defederating every instance that offers open registration; make a script to scan for it, and update the blocklist. Nobody should be running that way. If you are, not only are you allowing spam, you're also probably allowing humans who are engaged in ban evasion and other bad things. All posts and comments that come from your instance are in some small part your responsibility. Be at least vaguely aware of who your users are. If you ban one, and you run open registration, how do you intend to make sure they're not the user you just banned, signing up with another email address? We're not big tech, so we don't have the kinds of tools (IP reputation lists, lists of VPN IP addresses, etc) to fight ban evasion in any kind of automated way.
Almost every captcha implementation has an audio method in addition to the image portion. This is throwing the baby out with the bath water.
IP reputation lists, deny lists, username/email bans, are trivially bypasses and not worth the admin effort to update or maintain.