I can see the temptation, and maybe an impulsive response, but no, I wouldn't have taken it either.
i remember interviewing Kiss back in the 1980's, and my tape recorder broke, so Gene Simmons loaned me his portable Sony Walkman cassette player which recorded - a new invention then and worth several hundred pounds. When we finished, Gene forgot to pick up his recorder, and when i got home, i posted it to him via his UK record label.
I thought afterwards - it's pretty unlikely that it will find its way back to him - more likely snaffled by whom ever opened the package in London, and also, he probably woudn't miss it anyway, he is a multi-millionaire and could by dozens of the latest gadget any day of the week but ...
it was not mine to keep, i did the right thing by trying to return it, and i would never have felt comfortable using it, knowing I had come by it dishonestly.
Morality - it's a bi**h isn't it!!!!