From the daily and growing number of complaints, it's becoming apparent that we need an option to show "Only My Groups" in the feed. Agree?
Having to hide every group that pops up is cumbersome and also seems not to work for some, apocryphal evidence suggests. Whatever recent changes were made that resulted in a flood of random group posts appearing on everyone's feed, it is horrifically unpopular. If this was a move to try and increase traffic to various groups, it has backfired... to put it charitably.