The following users are spammers:

Asomeartys
Phentermine

In order to help combat spam I would recommend integrating a so called "Captcha" system. It's a system where when someone signs up for an account they have to enter in a series of letters and/or numbers that have been generated into an image. This image is obfuscated in such a way that only a human can read it. Sometimes spammers use character recognition programs to try and defeat such systems that is why the letters are often warped and have fuzzy and alternating backgrounds.

I noticed you are in fact already using the "Visual Confirmation" feature of phpBB when people sign up. Unfortunately, this particular Captcha implentation has been defeated by spammers for some time now.

For more information, see this link:
http://www.stampoutspam.net/basic/phpbb-better-captcha

That's just one example of many. With some more research you'll find a handful of other implementations as well.

Hi Alienswede,

Thanks for your help. I just saved the link to my Bookmarks.\