Depends on your use case. Since Beehaw has no open registration, but approves new users, that makes a difference.
[…] our reason for defederating, by and large, boils down to:
these two instances’ open registration policy, which is extremely problematic for us given how federation works and how trivial it makes trolling, harassment, and other undesirable behavior;
the disproportionate number of moderator actions we take against users of these two instances, and the general amount of time we have to dedicate to bad actors on those two instances;
[…]
If you want a moderated registration process, and people can join you through the backdoor, leaving that door open is like sticking a stick in your bike spokes.