A lot of good contributors to Lobsters have been banned for poltical reasons. Lobsters (laudably) has a moderation log that shows the reasons for user bans among other moderator decisions, but typically when when a good contributor is banned for poltical reasons (as opposed to e.g. a spammer), the actual posts that made the moderators decide to ban have been removed and replaced with a moderator message pithily asserting that the post was offensive; so it's hard for someone to see exactly what the last straw posts were and decide how reasonable the moderator was being.

And the moderators and most of the remaining userbase of Lobsters are American political left-progressives, and this dramatically informs how they choose to moderate.