what if someone is in a group, they're online, and they aren't looking for new members?
For Groups that are not accepting members:
There would be an option for groups to choose whether to be featured in the Group Finder Window if they are still open & searching for members or they can "hide" their group if the group is full of members or closed &/or they do not wish to be featured on the Group Finder Window.
What if they already have ten other people that want to join and are struggling to answer all their questions and send them all group invites?
But what if the group isn't online, someone see's the group on the list, clicks it, and sends an invite?