I’m sure you have a group pet peeves.  Below are few of mine.

1. Adding Members Without Permission
2. Group No Identity
3. Drive By Promotion

Solutions:

1. Send An Invite Or Ask For Permission
2. Have A Reason For Your Group With Rules
3. Promote On Promotion Date
4. Get To Know The Members

Social media is about building relationships not about wrecking them before they get started.