[lolinder]

Yes, it's concerning, but it has to the feel of being the end of a long conversation. I'm picturing something like this:

Manager: You're not allowed to contribute to VNIC.

Employee: But I'm doing it on my spare time!

Manager: You're still not allowed to contribute to VNIC.

Employee: But I'm using my personal email.

Manager: * the email quoted *

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It feels like someone who's hit the end of their rope with a long back-and-forth and is trying to close any remaining loopholes just to be done with the conversation.

[hummusandsushi]

Very good point, the message may be taken out of context that would change the interpretation of the message significantly.