You can try email.
In fact, you can try < captainspam at gmail dot com >. I've found some email servers don't like sending mail to addresses with the word "spam" in them, though, so you can also try < njk at exclaimindustries dot net >. Plus, if you're of the sort who likes PGP/GPG sorts of things, I'm somewhere in the key network. Look up key ID 0xE0356001 on your local friendly keyserver.
Rest assured, I have no Facebook or Twitter accounts. Though, for the time being at least, you can find me on Mastodon (or anything ActivityPub-like). My main account is @email@example.com, though I also have a backup at @firstname.lastname@example.org. The little widget you might see on the main page to the comic points to the social.exclaimindustries.net instance.
Plus, if you are of the IRC persuasion, I hide out in The Desert Bus Community IRC Network, the IRC home of the Desert Bus For Hope fan community. Join us in the Tucson bus depot as we patiently await the next pickup...Back to the comic