Good luck in your endeavors. SQL::Abstract and other SQL abstraction modules eliminate the risk of SQL injection and help make your code easier to maintain when working with databases. You could also implement a CAPTCHA using GD::SecurityImage to prevent getting spam in the first place, another great use of and way to learn perl!
Comment on Re: Search a SQL Table and Delete Records
The weird thing is I already have a CAPTCHA installed since I am using Wordpress. I just wanted to try a Perl solution instead. Still trying to work out the code.