[onona]

She handled it poorly.

1. Go all the way out the door with your dog. Make sure the door latches behind you. That way, you're not in a position to have to decide.

2. Never assume the role of security for the building. It's not your job. If it's that dangerous, the building owners should have hired guards.

[TheWriterTX]

Correct. Do not engage. Monitor and contact management.

[Blue Jays]

"...Never assume the role of security for the building..."

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Completely concur.
Somehow missed your excellent response when reading the thread.
I shared a very similar sentiment in Post# 100 on the previous page.