![]() The only ones affected by this barrier are the real end-users that can't decipher the distorted text. In the OP we see a good example of this delegation practice. Spammers already have sophisticated software for solving captchas (which arguably can be better than the human eye), or often using a captcha solving service that uses a hybrid between optical character recognition and paying minimal salaries to people in third world countries for solving the captchas for their bots. Not necessarily related to OP: We should have a service such as recaptcha offer an alternative to captchas by paying a small amount of money in Bitcoins (1000 satoshi or so) for signing up to websites.
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