I've often wondered why some people who join forums have to hide behind a
"nickname" at the first place. If you can't stand for what you're saying,
well, don't say it.
But not to show email adress may be a good adwise, because nowadays the
spamsenders use software who scans the web for valid emails to send this
spam to, even use as senders adress.
After I removed my maladress in the profile it's far less spam in my inbox,
but the one used at my website still collect quite a lot of it.
GJ