There is no need, apart from being tidy, to delete extensions if they have been disabled and had their data deleted.
Why do you need to disable all extensions in one go?
David Remember: You only know what you know and - you don't know what you don't know! My CDB Contributions | How to install an extension I will not be accepting translations for any of my extensions in Github - please post any translations in the appropriate topic. No support requests via PM or email as they will be ignored
Instead of posting a bunch of smilies and expecting everyone to know what your talking about (apart from the title), why not explain why such options would be beneficial?