Could be a great idea insert Cannabis to plant, harvest and smoke it. maybe with some temporary effects on the people [img]<fileStore.core_Emoticons>/emoticons/biggrin.png[/img]/emoticons/biggrin@2x.png 2x" title=":D" width="20" />

There's a mod for that in Kralyerg's Kave of Krazy Kontraptions here:  Legal Marijuana Mod.  Keep in mind that you need to put the mod above <abbr title="Colonial Charter">CC</abbr>.  Also, it is a Luxury, so you need one of the Luxury buildings (like a Tavern) to store it and distribute it.  Sorry, but you can't mod a change in the behavior of people - they are already pretty mellow anyway.