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Unfortunately, while CAPTCHAs may not be universally loved, there hasn’t really been a workable alternative found. There are some proposals, including logic puzzles, limited use accounts, and better filtering for spam, but none of these have been developed into a workable option. CAPTCHAs are going to be around for a while yet. The best we can probably hope for in the short term is that CAPTCHAs will become easier for humans to read, while still foiling most bots.