I realized, while doing some digital housekeeping, that Stack Overflow Inc. is using some of my writing, without attribution, in violation of the Creative Commons license under which they obtained it. To correct it, I would have to file a DMCA takedown demand, which would require me to be in contact with them and their lawyers, which is icky quite aside from any retaliation they might engage in. I don't currently have the will to deal with that, so they get away with violating my copyright and license.
I'd likely be ok with them using it, at least on the public sites, with the required attribution, and if they do so for other people's work they've taken, too. (I know I'm not the only one, because one of mine is in turn built on something by someone else.) I think they're banking on the fact that engaged users don't tend to mind and people they've driven out don't want to take on the burden of securing a correction. Such things do a lot more damage to the individual than to the corporate behemoth, after all. In their younger days they would have readily done the honest and ethical thing, but these days?
They can get away with it because they can make things unpleasant. But having noticed it, I can also note it here.