Today I bumped into a conversation which wasn´t meant for me, but still I wonder. Someone was very upset because people post in their garden without watering ( even when plants are due )
I didn´t know there is a rule like that .. that we should post on backwall if we only want to leave a message.
I know that people leave a message to thank me without watering and I do that too in their gardens too. Are we unpolite then, rude ? I don´t think so. But would like to know if this has been a Topic before?

There is no "rule" like this in the game.  Some people try to make up their own rules, but we are supposed to go by the official rules.  The intro tab to the wildlife guide says we may leave a message or not.  That's the rule from the Game Developer.  If anyone jumps on you for the way you leave a message, you can click the "report" link on their post and let Support deal with them.

Thankyou Rachel, noone jumped on me :)