[doc] [tor] Clarify when to use bind

c.f. #6585

Author: MarcoFalke

doc/tor.md

@@ -70,9 +70,14 @@ In a typical situation, where you're only reachable via Tor, this should suffice
 
 	./bitcoind -proxy=127.0.0.1:9050 -externalip=57qr3yd1nyntf5k.onion -listen
 
-(obviously, replace the Onion address with your own). If you don't care too much
-about hiding your node, and want to be reachable on IPv4 as well, additionally
-specify:
+(obviously, replace the Onion address with your own). It should be noted that you still
+listen on all devices and another node could establish a clearnet connection, when knowing
+your address. To mitigate this, additionally bind the address of your Tor proxy:
+
+	./bitcoind ... -bind=127.0.0.1
+
+If you don't care too much about hiding your node, and want to be reachable on IPv4
+as well, use `discover` instead:
 
 	./bitcoind ... -discover