@Override
	public Set<MOB> getGroupMembers(Set<MOB> list)
	{
		if (list == null)
			return list;
		if (!list.contains(this))
			list.add(this);
		final MOB following = amFollowing();
		if ((following != null) && (!list.contains(following)))
			following.getGroupMembers(list);
		for (final Enumeration<Follower> f = followers(); f.hasMoreElements();)
		{
			final Follower F = f.nextElement();
			if ((F.follower != null) && (!list.contains(F.follower)))
				F.follower.getGroupMembers(list);
		}
		return list;
	}