This is a prime example of why I am so vigilant/paranoid about any service on Steemit. Now, unlike @crypto.piotr, I do not have enough SP to be worth hijacking, but the principle is the same. I also keep a close eye on  https://steemd.com/@redpossum although that can be a bit flaky/laggy in reporting my activity.

In general, I am very relucant to give any of my keys to anyone or anything. In part, I suppose this is because of my background as a network admin, but I do strongly believe that in matters of security, a little paranoia is a good thing. Better to be too suspicious than not suspicious enough.