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Not it's not. Not even slightly.
The amount of mental effort required by users to memorise a different password for every internet site is at best unreasonable, if not a completely insane idea. While using the same password for Hotmail and internet banking is really not a good idea, using the same password for wordpress.com and wordpress.org is just common sense for people who don't have a photographic memory.
Blaming the user here is unreasonable.
Here's a paper on the same subject from 18 years ago, and that was just the first result I found on google scholar!
Obviously, there have been advances since then but this certainly isn't a new idea by any stretch of the imagination.
If you were hoping to take your custom away from these services and give others your money, this isn't the way to do it
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