Consider protective module nix mentioned

Don't remember its name, something nix thought would be good for stopping spam.

Review its functionality, consider what options we need, alternatives, make a plan...

Mike: CAPATCHA is loaded and indicates it is blocking some automated registrations - I'll try yo contact nix and see if he remembers....

 Email from JW: I think we can ignore this. The captcha that asks some stupid questions seems to work well, I don't see a need to change it. Sounds like I should have reviewed this task and cancelled it when captcha was introduced. Or maybe this was indeed the module that nix recommended.