Have gotten multiple such emails the last couple of weeks.
I think Googles spam detection is a bit too much lax when the sender itself is using gmail.
These might as well be hacked accounts which have already proven themselves to be valid and "human" at a previous point in time? I doubt gmails spam detection would let a brand new account spam CC'd emails without any sort of detection.
Brendan Gregg is the author of most of the utilities, not bpf/ebpf itself. You can find a non-exhaustive list here: http://www.brendangregg.com/ebpf.html