You clearly have more confidence in these databases than I do. It seems hardly a week goes by without either a bank or airline geting hacked and thousands of people having their information disseminated. However, as far as I understand what you have said, my information is out there whether I like it or not. Presumably the only way to isolate my personal data is to go completely off grid.
Your IP is of no interest to anyone TBH. Everybody has one or more (apparently I have over 4 billion of the damn things
), and they are not really useful.
Your name, address, credit card, bank, demographics and so on are far more valuable. And these are given away at will by the likes of Facebook (if you don't have an account, some of your friends and family will), and heavily recorded/tracked and used for advertising by the likes of Google and Amazon. These companies don't track you via your IP, in fact hardly anyone does. You are no doubt aware of the amount of demographics collected by the likes of Tesco through Clubcard and Sainsburys through Nectar - its staggering.
Sadly, I would argue that its impossible to stay off the grid in the UK, because somebody somewhere will know about you, be it being on the electoral role, or through your bank which is now needed for your pension. Once you have given info to anyone, its no longer secret, either by design or by mistakes.
No doubt you've had one of those emails where somebody claims to have hacked you, and turned on your webcam whilst you were having a wrist flick etc, and include your password. These are what scares most people, but they are just passwords for your email from various big hacks. These should serve as nothing more than a reminder about good security practices, and regular password changes (and not using same password on different sites).
Everybody will have some security incident at some point, from a computer virus/malware, a data breach from a company/organisation you have dealt with, a card clone/swipe and so on.