[armedpacifist]

Gmail has this feature baked in. Append a + sign to the username and then append any string you want, ie. [e-mail]. It will forward these mails to your regular email address. I started doing this for the exact same reason as mentioned above, but you can obviously do more than just creating honeypots. Also you have to ignore the fact that it's Google...

[zaik]

There already exists at least one popular js validation framework which removes Gmail (and others) subaddresses per default in its "normalizeEmail" method: https://github.com/validatorjs/validator.js/blob/master/src/...

[austinjp]

I do this. A small annoyance can crop up when trying to log in to a service with your + modified email address. Hmmm, what did I append after the plus? If you can't remember that, you can't use the "forgot my password" function either :)

Usually soluble, but irritating.