In mythology the goat symbolises the lost. I prefer to think that if goats were ostracised it is because of their fierce independence and self-sufficiency.
These are qualities that any culture or community needs in a few people, because they create waves and challenge the status quo. It’s easy to see why goats should stay in the minority though, too many would mean chaos. Sheep are more manageable and reliable.
Bad Rap? Websters Dictionary explains:
1. An unjust accusation, verdict, or punishment…
2. An adverse opinion or judgment considered undeserved or unjust.