Honestly the only problem with your scheme has been sharing it. If your hackernews account can be used to find other accounts of yours online, you've just made

Honestly the only problem with your scheme has been sharing it. If your hackernews account can be used to find other accounts of yours online, you've just made writing a custom brute force script for your accounts much easier. I imagine you've done more than most people who customize passwords based on the site/domain name, but you should never share the specifics of your algorithm. It reduces brute force effort against you from nearly infinite to possibly hackable.