registration-form.md

@@ -46,6 +46,11 @@ We welcome anyone able to use our services and willing to accept the responsibil
 
 We particularly celebrate diversity and do not tolerate bigotry, prejudice or supremacy of any kind. Diverse opinions on politics, religion, and other matters are welcome as long as they align with our core values. Let there be no confusion, Social.Coop is anti-racist, anti-fascist, and anti-transphobic. Moderators will take action on posts that contravene this Code of Conduct.
 
+## Are you a robot?
+
+<label for="math-spam-trap">What is two plus seven?</label>
+<input id="math-spam-trap" name="math-spam-trap" type="text" required maxlength="50">
+
 <input id="submit" type="submit" value="Submit!">
 
 </form>