Updated: Sep 24
Do you hesitate to sign up for online services because you know you will have to put up with spam thereafter? Of course, you can unsubscribe or block the emails that follow, but here's how to avoid them in the first place.
Using www.anonaddy.com you can create a dummy address to sign up and field the emails that follow. The service will forward any emails you do want on to your genuine address, but you gain access to the service without disclosing your real details.
It is not intended to use as a regular email address, as you would only receive and not send messages from it, however it's a handy way to create an alias when needed.