diff --git a/FAQ.md b/FAQ.md
index 9865732..b68d98e 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -7,6 +7,7 @@
   * [How to determine the buffer size?](#how-to-determine-the-buffer-size)
   * [What are the common sizes for JsonBuffer?](#what-are-the-common-sizes-for-jsonbuffer)
   * [I found a memory leak in the library!](#i-found-a-memory-leak-in-the-library)
+  * [Why shouldn't I use a global `JsonBuffer`?](#why-shouldnt-i-use-a-global-jsonbuffer)
   * [How to reuse a `JsonBuffer`?](#how-to-reuse-a-jsonbuffer)
   * [What's the best way to use the library?](#whats-the-best-way-to-use-the-library)
   * [How to write a function that works with both `JsonArray` and `JsonObject`?](#how-to-write-a-function-that-works-with-both-jsonarray-and-jsonobject)
@@ -168,10 +169,22 @@ See issues [#72](https://github.com/bblanchon/ArduinoJson/issues/72), [#87](http
 See [ArduinoJson: Avoiding pitfalls](https://github.com/bblanchon/ArduinoJson/wiki/Avoiding%20pitfalls) and [FAQ: What's the best way to use the library](https://github.com/bblanchon/ArduinoJson/wiki/FAQ#whats-the-best-way-to-use-the-library)
 
 
+### Why shouldn't I use a global `JsonBuffer`?
+
+ArduinoJson is designed to do one thing and to do it well: **the JSON serialization**.
+It's not a framework that you can use as a backbone of your application.
+In particular `JsonObject` and `JsonArray` should not replace your own data structures; that would be terribly inefficient.
+
+So before trying to use a global `JsonBuffer`, ask yourself first "Am I really using ArduinoJson for serializing, or am I pushing it beyond its initial intent?".
+
+See also [How to reuse a `JsonBuffer`?](#how-to-reuse-a-jsonbuffer) and [What's the best way to use the library?](#whats-the-best-way-to-use-the-library).
+
+See issues [#160](https://github.com/bblanchon/ArduinoJson/issues/160), [#203](https://github.com/bblanchon/ArduinoJson/issues/203), [#219](https://github.com/bblanchon/ArduinoJson/issues/219), [#242](https://github.com/bblanchon/ArduinoJson/issues/242), [#243](https://github.com/bblanchon/ArduinoJson/issues/243), [#341](https://github.com/bblanchon/ArduinoJson/issues/341) and [#347](https://github.com/bblanchon/ArduinoJson/issues/347).
 
 ### How to reuse a `JsonBuffer`?
 
 `StaticJsonBuffer` and `DynamicJsonBuffer` are designed to be throwaway memory pools, they are not intended to be reused. 
+As a consequence, using a global `JsonBuffer` is almost always a bad idea.
 
 If you believe you need to reuse a `JsonBuffer`, it's because [you're not using the library correctly](https://github.com/bblanchon/ArduinoJson/wiki/FAQ#whats-the-best-way-to-use-the-library).