Office 365 Groups at Microsoft Ignite 2017 - recordings are live!

I really wanted to like groups -- and mostly do. But that fact that any group member can delete an item from the group someone defeats the purpose. We want to use groups as a running message board, but someone can accidently delete a message before anyone else has read it.

Teams sort of fill the same purpose, but groups seem like a equally good solution (except for the delete issue)