Earlier this week Google announced they have opened their Gmail e-mail service to all. In the past you either had to know someone who could send you an invitation or more recently be able to receive a confirmation /activation registration code via a cell phone text message. This announcement spawned an interesting discussion on the CyberNet Forums, Gmail finally really open to everyone!!!!. It is noteworthy to point out that many people say Gmail has the best spam filter of most web based e-mail services, but now that it is open to all what is to stop spammers from creating…