Akismet has always been good for me for WordPress and I see there's a Drupal plugin for it too. It's not free, but I think it's reasonably priced for how well it functions and the headaches it saves me with no frustration for commenting users.
wavelen 25 days ago [-]
I had this problem recently and I figured that I was trying to find a solution for a problem I didn't even have.
I decided to just not use any form of captcha. If it ever becomes problematic (e.g. spam) I can still implement a captcha again. Until now it works perfectly fine.
viraptor 25 days ago [-]
Have you tried starting with a completely trivial solution to see if you have anyone targeting you at all? By trivial, I mean "write number four in this text field". If you get only full-auto spam bots, that should be enough.
Gaelan 25 days ago [-]
Almost certainly don't—I kinda assumed something that trivial would get handled by full-auto bots by now, but maybe not.
luckylion 25 days ago [-]