[Operators] Annoying spam

[Jack L. Frost]

On Wed, Nov 11, 2015 at 11:11:34AM +0200, Aleksey Bryohov wrote:
> Yes, last 2-3 weeks there are many registrations on my server 
> (jabberon.ru). Many JID's become deleted after first login (probably, 
> deleted automatically by the bot). More that 90% or registrations from 
> Germany IP's. Captcha protection does not stop registration.

From what I know, there are numerous organizations selling captcha-solving
services to people. Captcha hasn't been effective for years now.
I had to remove free registration on crab.im because of all the abuse reports I
was getting.
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