I imagine that few people actually enjoy filling out captcha boxes, but the alternative is horrible. No one wants to wade through lots of unconnected comments that are really just attempts to either game the search engines or lure you to some shopping website that will never actually ship you any product if you are foolish enough to buy something.
So, while looking around for some captcha alternatives, I had these thoughts
- Most of the alternatives seem to expose character based data. If they ever get popular at all, the bots will be all over them just like some of the early captchas.
- How easy would it be to defeat a comment submission page written in flex/flash? It seems like that might be hard to script a bot for, but could probably be defeated with a mouse/keystroke recorder of some sort if there were no challenge on the page.
- This one is my favorite. Why not do away with captcha all together, but run your comments moderation through your email spam/bayesian filters. Comments get deleted if they aren't approved in a month, and you could set up a rule to automatically accept any comment that made it through the spam filter. The spam filter on my gmail account works terriffic. I think I might be able to actually set that up here. Maybe I'll give it a whirl if I run out of things to do.