When you register for new forums or sites, what is the purpose of making you enter a list of letters>

[Arabian]

When you register for a new forum or site, they normally require you to enter a list of letters or numbers such as: LJigTN what is the purpose of this.

 

[nimbus]

so automated spambots can't create accounts and spew their filth

 

[Arabian]

so automated spambots can't create accounts and spew their filth

That makes sense... Thanks for the response....k to you