"You must solve the CAPTCHA to post."
"Please solve the CAPTCHA before posting. If the CAPTCHA doesn't open in another tab, use this link"
"Verifying you are human"
"Integrity check failed."
"The CAPTCHA answer was incorrect."
"Verifying your browser"
"Computing proof of work..."
"Select all squares with [X]"
"Please try again."
"Posting from your IP range has been blocked due to abuse."
In my opinion, CRAPTCHAs and PoWs are the worst things to ever exist because I am forced to wait six jillion years to solve the CRAPTCHA only for it to fail and forced to start all over. And they also datamine you to death. Like (((Clownflare))). It's literally a singularity disguised as a party saving gem because mi clitty is leaking o algo.
Bonus:
"You need voice +v (#soy)"