Ask HN: Use randomly generated email addresses for extra security?

[PlanetFunk]

It seems that one attack vector used to hack accounts is based on the same email address being used on multiple sites. This would also go for email addresses using a simple algorithm (ie. [e-mail] for HN, [e-mail] at FB, etc).

In the age of keepass/lastpass etc, and on a scale of 1 to "tin foil hat", would it be better to use a randomly generated address for each site (ie. [e-mail])?

Edit: This is using your own custom domain, and catch all email address. You could probably use gmail/hotmail accounts, but setting them up would be very annoying.

[w00kie]

With Gmail (at least) you can use john.smith+46ia0ygd51tw9src@gmail and it will get to you.

[9mit3t2m9h9a]

Standards say that +-addresses must work this way, and most receiving servers implement this correctly. I actually had more trouble when some sending service failed to send to such an address correctly.

[PlanetFunk]

So, at least with gmail, you could implement randomly generated email addresses for logging in.

The question is, does this solve the problem and is it a problem worth solving?