diff --git a/content/_index.gmi b/content/_index.gmi
index 8cc5677..1222dc3 100644
--- a/content/_index.gmi
+++ b/content/_index.gmi
@@ -44,6 +44,8 @@ Chat with me: I prefer IRC, where my nick is Seirdy on Libera.chat, Snoonet, OFT
 
 My secondary Matrix account for Synapse-only rooms is @seirdy:fairydust.space.
 
+If you send me marketing emails or solicit guest posts, I will block you and submit you to third-party blocklists without warning.
+
 ## Links
 
 Orbits (Gemini equivalent of webrings):
diff --git a/content/_index.md b/content/_index.md
index 50cf6f2..3988600 100644
--- a/content/_index.md
+++ b/content/_index.md
@@ -32,7 +32,7 @@ Git repos: [Sourcehut](https://sr.ht/~seirdy "{rel='me'}"), [GitHub](https://git
 
 ### Contact
 
-Contact me via [email](mailto:seirdy@seirdy.one "{class='u-email' itemprop='email' rel='me'}") ([PGP](./publickey.asc "{rel='pgpkey authn' type='application/pgp-keys' class='u-key'}")), or on the Fediverse where I'm [@Seirdy<wbr />@pleroma<wbr />.envs.net](https://pleroma.envs.net/seirdy "{rel='me' itemprop='sameAs' class='u-url'}").
+Contact me via [email](mailto:seirdy@seirdy.one "{class='u-email' itemprop='email' rel='me'}") ([PGP](./publickey.asc "{rel='pgpkey authn' type='application/pgp-keys' class='u-key'}")), or on the Fediverse where I'm [@Seirdy<wbr />@pleroma<wbr />.envs.net](https://pleroma.envs.net/seirdy "{rel='me' itemprop='sameAs' class='u-url'}"). If you send me marketing emails or solicit guest posts, I will block you and submit you to third-party blocklists without warning.
 
 Chat with me: I'm on several IRC networks. Alternatively, I'm [@seirdy<wbr />:seirdy.one](matrix:u/seirdy:seirdy.one "{class='u-impp u-url' rel='me'}") on Matrix.
 
@@ -46,3 +46,4 @@ This is a basic [IndieWeb site](https://indieweb.org/).
 In addition to its [canonical url](https://seirdy.one), a "rough draft" of this website also exists on my [Tildeverse page](https://envs.net/~seirdy/). This site's content also appears on my [Gemini capsule](gemini://seirdy.one).
 
 For more information about the site, its design, and available feeds: [see the "meta" section](./meta/).
+
diff --git a/content/about/_index.gmi b/content/about/_index.gmi
index 45f5097..29a5433 100644
--- a/content/about/_index.gmi
+++ b/content/about/_index.gmi
@@ -53,6 +53,8 @@ My handle is "Seirdy" on all the platforms I use:
 => mailto:seirdy@seirdy.one email
 => ../publickey.asc PGP: 1E892DB2A5F84479
 
+If you send me marketing emails or solicit guest posts, I will block you and submit you to third-party blocklists without warning.
+
 My username is Seirdy on Reddit, Hacker News, Lobsters, Tildes.net, Linux Weekly News, Codeberg, and a few other places. For IRC, my nick is Seirdy on Libera.chat, Snoonet, OFTC, Tilde.Chat, apionet, and a few smaller networks.
 
 My secondary Matrix account for Synapse-only rooms is @seirdy:fairydust.space. My Matrix account used to be @seirdy:envs.net but I've since migrated to my own Conduit server.
diff --git a/content/about/_index.md b/content/about/_index.md
index 559dfd3..dc5020a 100644
--- a/content/about/_index.md
+++ b/content/about/_index.md
@@ -95,6 +95,8 @@ I go by <span class="p-nickname nickname" itemprop="alternateName">Seirdy</span>
 
 </dl>
 
+If you send me marketing emails or solicit guest posts, I will block you and submit you to third-party blocklists without warning.
+
 At least two platforms listed in the "Social (centralized)" category are not endorsed, and I'm trying to wind down my use of them. If you find a "Seirdy" somewhere else and don't know whether or not it's me, please contact me and ask instead of assuming that it must be me.
 
 I used to have the Matrix ID `@seirdy:envs.net`. I sometimes use `@seirdy:fairydust.space` for technical reasons (seirdy.one runs a Conduit server but certain features only work in Synapse rooms).
@@ -108,6 +110,7 @@ If you want to follow me on the Fediverse, [read my Fediverse greeting first]({{
 Selected projects
 -----------------
 
+
 [Clogstats](https://sr.ht/~seirdy/clogstats/)
 : Analyze WeeChat logs to quantify, graph, forecast, and perform anomaly-detection on IRC channel activity. Written in Python; uses Pandas.