@palakzatakia thanks for the questions!
1) PartyOn was designed for people gathered in the same location, but once you start a party, you can also send people a direct link to the party from within the app. As of now, the party host needs location on when the party is started, but can be turned off once it starts.
2) You can only bump/dump songs when you're inside the party. We don't have a 'banned' user option yet but we're working on it...
PartyOn