Oh, you see he means it like this. People make groups, but as most groups in Hive, they are only active during a short period of time in the very beginning of the group, some dont even become active at all. So making them is pointless spam.
DP on the other hand is an active group, with many posts and pics every day. i actually believe the only really active social group on Hive is DP =/
So what he means is, if groups are made they must be active to be worthy of exisiting, and right now people are creating countless groups that will live a week at max.