Some of us who have been around for more than a few years may well have used a myspace account at some point in the past. And you may well have set your account up with a password that is weaker than the kind of password you would use today (or hopefully it is!); in addition myspace has been compromised and up to 360 million account details have been leaked.
You may very well think that your myspace account is no longer of interest to you – fair enough. But you should ask for it to be deleted if that is the case. And if not, you should change your account password.
But there is a general point here. If you have old accounts on old services then you should go back and change the passwords to be more secure; if you do not want to be bothered, you should request that the account is removed.