I did unintentionally offend a guy in one group a few years ago (he thought my story hour entries made him look stupid.) Because of some real life things going on (birth of my third son coinciding with this, more or less) the group fell apart temporarily around that issue.
We later got back together again briefly, until work schedules ruled it out again. Then I found another group right about then, and haven't been interested in going back. It was also a 45 minute drive for me, which was part of the reason to not make an attempt to keep it up.
So, no, I guess I wasn't thrown out, but if I hadn't realized what I was unintentionally doing and apologized, the group would probably have broken up, and then reconvened without me (since I was the relative newbie in that group, and most of the rest of them were old friends.) I guess it might have amounted to about the same thing.