docs/node/run-your-node: Add a tips about state sync

Following those tips prevents (unlikely) long range
attacks.

Author: martintomazic

docs/node/run-your-node/advanced/sync-node-using-state-sync.md

@@ -23,6 +23,15 @@ to be able to [detect and submit evidence for a light client attack].
 
 :::
 
+:::tip
+
+After a successful state sync it is always recommended to manually check if you
+see the same chain as others. This can be done by comparing block hash at
+a recent height with sources that you trust: e.g. your own nodes, trusted nodes
+from external entity, block explorers, etc.
+
+:::
+
 To configure your node to use the state sync, amend your node's configuration
 (i.e. `config.yml`) with (non-relevant fields omitted):
 
@@ -93,6 +102,13 @@ configuring the trusted height and hash for the block that is around 10 days old
 
 :::
 
+:::tip
+
+If using centralized or untrusted sources it is always recommended to
+fetch and compare data from multiple sources.
+
+:::
+
 #### Block Explorers
 
 Browse to one of our block explorers (e.g. [Oasis Explorer], [Oasis Scan]) and