I agree. I asked about this a while ago on Super User:

http://superuser.com/questions/235937/does-e-mail-address-ob...

The top answer links to a study done a few years ago that showed that revealing your email in plain text did result in increased spam, but I don't think the study went into how effectively that spam was handled by modern spam filters.

In my own person experience, I've had my email address on my HN profile, Twitter page, personal website, Stack Exchange profiles, etc for years without any problem. I do get the occasional rare piece of spam but I think that it's more than offset by providing a no-nonsense way for people to contact me.