That is so true.
Zone Alarm is one of the best things a user should have on his/her computer nowadays.
It used to be downloaded for free..but I see that recently they are finally commercializing it completely.
Another tip: Good to have with the firewall of your chioce an antivirus of your choice, enabled with real time scanning while you're downloading emails or any other type of files.
And last but nevertheless important, one good security approach should also be , to enjoy your browsings behind a proxy service.
The things that a firewall may miss when blocking incoming data, can be filtered and watched behind a proxy.
Combined with a firewall uuu la la!!!