NO POLITICS.
Almost inevitably, most of the people joining Lemmy instances are former-reddit posters those who consider it a ‘reddit clone’ as opposed to an independent link aggregator site. This can be seen in the most popular communities (simply recreations of existing reddit subreddits), terminology (people saying ‘sublemmies’ or ‘subs’) and most importantly, habits.
What social habits have you seen that are commonplace on reddit but should really be discouraged among users moving to here?
I find this is a general problem with commercial sites. The goal is to keep users engaged and to show growth as opposed to create a healthy environment for discussion. There are lots of studies showing that encouraging negative behaviors actually drives engagement.