In fact I've worked for two multinationals where we had to remove loosely-licensed software from our dependency chain and replace it with MIT licensed alternatives because the IP guys were fine with MIT but public domain or copyleft made them blanch.

The first one was ten years back, and they acted like this has always been a problem.

I know that there are several nations, Germany being the one I've read the most about, that do not support the notion of 'public domain' at all. It is simply impossible there to give up a copyright. You can extend rights to everybody, but you are still legally bound to any work you create for things like liability purposes. I've always been surprised that this isn't a bigger problem than it sounds. I'd be quite worried about putting code online if my countries legal system made me forever liable for its use regardless of what kinds of license I released it under.

It's hard to concieve a case were you could be liable for anything by simply putting up code online (except for cases where you don't have the rights, e.g. copyright, to do that in the first case or including a death threat in the code) but I hope there is no place that allows you to simply state "I am not liable" to absolve you of your wrongdoings. Usually you are not liable for what other people do with your code.

The German case of nor allowing to give up all your rights has another intention: In the past creators were pressured to give up certain rights which was deemed unfair. To protect the weaker party in negotiations you can't sign away some rights, e.g. allowing defecament of your work, the right to not have someone else's named as an author, or remuneration for a novel not yet envisionable use of the work.