This is why it is critical to never use your master key for any reason unless it is recovering your account or changing password. Every time you use that key you put your account at risk.
This is also another reason to store liquid funds on an alt that you typically don't log into (aka Cold Wallet), you can send funds without ever logging in. I would only recommend this if you have a significant amount of Hive/HBD you need to protect. For a couple Hive I wouldn't worry about it.
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A lot has changed since those early days when it was necessary to use your master key for some functions and it was still possible to accidentally post keys.
It taught me a valuable lesson and these days I don't keep any more liquid than I would be willing to loose, but your cold storage idea is a great safety solution.