I use DO for bootstrapping and trying out new ideas, programs & co. There is no information I can think about I would wish to get wiped off of the SSD.
Seriously, if there's nothing on your cheap sandbox server that you don't want published, you're probably not using it in the first place.
Yes, this issue needs to be raised. No, you can't say that anyone who doesn't agree is a non-factor.
You have the option to scrub your data anytime you like, I've always understood that wasn't the default on DO.