reCAPTCHA is BAD for a couple of reasons:
Example 1: Bypassable
That is especially true for reCAPTCHA. In fact, bypassing reCAPTCHA is more common than hCAPTCHA
Example 2: Doesn’t work… sometimes
Sometimes, reCAPTCHA is so annoying that it may prevent people from logging in to Roblox. Even 7 year olds signing up for roblox will not like them
GeeTest also explains the problem with CAPTCHAs: Security vs User Experience
And might be suitable for kids
