On a similar thread just last week it was made evident that A'gon is fighting new attacks of spam and scammers. No need to hyperventilate. They're on it.
The only Catcha routines I went through was when they implemented the new system with easier posting of links, photos, videos, etc. Haven't had any of it since and my OS is on a 12 year old iMac with an out of date browser.
All the best,
Nonoise