There’s some misinformation floating around regarding Lemmy not having a karma system. While many have discovered otherwise, this is for those who may not have.
While it’s not exposed in the Lemmy default user interface, Lemmy does have a fully functional karma system and it is visible in third party clients such as WefWef and Memmy.
Do with that what you will.
How does requiring a minimum account age cause group think?
It was more of a response to the minimum account karma.
Account age is reasonable enough, after the service has grown a bit more.
However, if people start getting banned for the wrong reasons and have to create new accounts to be able to have discussion. It does create a barrier for that discussion to take place.
What would be good or bad reasons?
It is seriously difficult to have negative account karma on reddit unless you are an outright troll.