Spammer Problem with Mantis

[alaoa]

I have a bug tracker at support.aretimes.com and it seems to have gotten hijacked by spammers because I had anonymous access enabled. I have since disabled it and i was wondering if there was a way to remove multiple notes. When i try to remove an issues with multiple notes on it the php file come up.

[alaoa]

Is there any way to implement a captcha for anonymous postings?

[Kirill]

Is there any way to implement a captcha for anonymous postings?

not