Checkuser policy says checkuser should be done to stop vandalism while it must respect privacy of users, even that of users that currently vandalizes a wiki. There is some room for stewards to decide if a user should be checkusered simply because he vandalized a wiki. Imagine if User A is an old account and user B is a new account. They disrupt the same wiki in the same way and people are requesting SRCU. Will you choose a) Checkuser is performed to determine if they are linked to the same IP or another possibly innocent user, and these users are blocked, or b) Checkuser is not performed because we already know their behaviour is similar, we only need to block these users, or c) Checkuser is performed and the IP addresses of these users are published so that administrators could block their IP. If another steward uses checkuser on a user simply because he vandalized a wiki and somebody files a checkuser request, what action would you take? ––

The role of the steward is to seek/weigh opinions, ask questions where needed and then identify consensus.