Is captcha actually effective at preventing spam?

>>588019
yes

>it's a "hello i never used pre-captcha 4chan" episode

>>588019
no

/pol/harbor

>>588022
It worked good whenever some dumbasses weren't running stupid colored box scripts. But those were pretty funny.

>>588031
>t. kimmo alm

>>588019
Yes. It just also happens to fight the users as well.

>>588019
Yes, just visit any imageboard on the internet that didn't implement a strong captcha.

absolutely yes

you werent here where every second thread on /b/ was some shady ad for dumb shit. people could spam entire threads with penis enlargement or ponies

>>589694
I remember those threads.
You can still occasionally find shady ads on /b/. Much less frequent though.