They kinda do though, in that instances have been observed to send unrequited messages even when the person/people in charge of some account didn't expressly ask the models to do so.
For my own use of LLMs, I do try to avoid anything which I know has a risk the artefacts they produce may end up DoSing or spamming, and I've avoided the OpenClaw-type pattern for a broader range of reasons of which this is simply one tiny part, but I'm not absolutely confident I could avoid this even in the code coming out of the free tier of the web chat interfaces except by checking every single line of output every single time.