I really don't understand lazy censoring. You can either not use the thin pen tool or just spend a few more seconds making sure it's unreadable. What's the point of doing it at all if people can still decipher what you're obscuring?
In general I think best practice is to call out “hey, I can see your area code in case you want to edit your post to more fully redact it” then any jokes about “since I wouldn’t want anyone to know I lived in [REDACTED] either!”