Please make it so either the profile doesn't show the payment information status and/or that payment information had been used. This is a privacy concern and also potentially could be advertising your account to people with malicious intentions to whether it is a viable and valuable target to break into. I don't see a good reason for having this information publicly broadcasted that could possibly outweigh the bad.
I'd even go so far as to say I'd like to hide my premium status for the very same reasons. I absolutely have no reason for other residents to know any information like this.
I'd like all status on my profile that could be correlated with my account being connected to real life payment information to be hidden from other residents.
Second Life really could use a privacy settings overhaul and this is one of those things.