adds criticism and commenting rulez

basics.html

@@ -917,7 +917,24 @@
             - we: review one MR, show line comments in GL, thumbs up
           </section>
 
-          <section id="collab-review-coc" data-markdown>
+          <section id="collab-review-criticism" data-markdown>
+            ## criticism / commenting
+
+            - **positive**: leave a star, blog about it
+            - **negative/destructive**: keep it to yourself!
+            - **constructive**: issues and merge requests!
+              - check if already reported
+              - emote if you agree
+              - discuss if you disagree
+
+            notes:
+            - issues / requests are supposed to be technical
+            - avoid **#metwo**, this is annoying for maintainers, use emotes
+            - rule: comment only if you have something new to add to the
+              discussion
+          </section>
+
+          <section id="collab-review-code-of-conduct" data-markdown>
             ## review
             ### code of conduct
 
@@ -928,7 +945,8 @@
 
             notes:
             - the discussions are usually public, so be aware of that
-            - decide with your team, write `CONTRIBUTING.md`
+            - usually needed when community grows
+            - decide with your community, write `CONTRIBUTING.md`
           </section>
 
           <section id="collab-review-your-turn" data-markdown>