Should I recommend sealing classes by default?

Question

In a big project I work for, I am considering recommending other programmers to always seal their classes if they haven\'t considered how their classes should be subclassed. Oft

Answer 1

Your house, your rule.

You can also have the complementary rule instead: a class that can be subclassed must be annotated; nobody should subclass a class that's not annotated so. This rule is not harder to follow than your rule.