I have a wildcard email on my domain. In fact multiple domains. Multiple of these have emails listed in bug trackers, git repos and in plaintext on my website.

The only filter I have is a couple of regular expressions to block the most lazy of spam at submission time. Even without that I got less than 50 spam mails a day, usually quite a bit less - and almost all of those are automatically sorted into my spam folder. How long does it take you to glance over a low two digit number of emails each day? Not a lot for me.

I think the "spam" problem is overrated. Do you get more spam than me or do you just have different expectations?