diff --git a/examples/gno.land/r/demo/boards/public.gno b/examples/gno.land/r/demo/boards/public.gno
index 1ef2e72f4c2..1d26126fcb2 100644
--- a/examples/gno.land/r/demo/boards/public.gno
+++ b/examples/gno.land/r/demo/boards/public.gno
@@ -17,7 +17,9 @@ func GetBoardIDFromName(name string) (BoardID, bool) {
 }
 
 func CreateBoard(name string) BoardID {
-	std.AssertOriginCall()
+	if !(std.IsOriginCall() || std.PrevRealm().IsUser()) {
+		panic("invalid non-user call")
+	}
 	bid := incGetBoardID()
 	caller := std.GetOrigCaller()
 	if usernameOf(caller) == "" {
@@ -41,7 +43,9 @@ func checkAnonFee() bool {
 }
 
 func CreateThread(bid BoardID, title string, body string) PostID {
-	std.AssertOriginCall()
+	if !(std.IsOriginCall() || std.PrevRealm().IsUser()) {
+		panic("invalid non-user call")
+	}
 	caller := std.GetOrigCaller()
 	if usernameOf(caller) == "" {
 		if !checkAnonFee() {
@@ -57,7 +61,9 @@ func CreateThread(bid BoardID, title string, body string) PostID {
 }
 
 func CreateReply(bid BoardID, threadid, postid PostID, body string) PostID {
-	std.AssertOriginCall()
+	if !(std.IsOriginCall() || std.PrevRealm().IsUser()) {
+		panic("invalid non-user call")
+	}
 	caller := std.GetOrigCaller()
 	if usernameOf(caller) == "" {
 		if !checkAnonFee() {
@@ -85,7 +91,9 @@ func CreateReply(bid BoardID, threadid, postid PostID, body string) PostID {
 // If dstBoard is private, does not ping back.
 // If board specified by bid is private, panics.
 func CreateRepost(bid BoardID, postid PostID, title string, body string, dstBoardID BoardID) PostID {
-	std.AssertOriginCall()
+	if !(std.IsOriginCall() || std.PrevRealm().IsUser()) {
+		panic("invalid non-user call")
+	}
 	caller := std.GetOrigCaller()
 	if usernameOf(caller) == "" {
 		// TODO: allow with gDefaultAnonFee payment.
@@ -113,7 +121,9 @@ func CreateRepost(bid BoardID, postid PostID, title string, body string, dstBoar
 }
 
 func DeletePost(bid BoardID, threadid, postid PostID, reason string) {
-	std.AssertOriginCall()
+	if !(std.IsOriginCall() || std.PrevRealm().IsUser()) {
+		panic("invalid non-user call")
+	}
 	caller := std.GetOrigCaller()
 	board := getBoard(bid)
 	if board == nil {
@@ -143,7 +153,9 @@ func DeletePost(bid BoardID, threadid, postid PostID, reason string) {
 }
 
 func EditPost(bid BoardID, threadid, postid PostID, title, body string) {
-	std.AssertOriginCall()
+	if !(std.IsOriginCall() || std.PrevRealm().IsUser()) {
+		panic("invalid non-user call")
+	}
 	caller := std.GetOrigCaller()
 	board := getBoard(bid)
 	if board == nil {