Yes, the slave crest has the possibility of prohibiting desertion itself.
Once they leave the grounds, inducing death was even possible, but as one would expect, I paid no small amount for these guys, so killing them would be bad.
Besides, I have plans to designate slaves to peddle outside the village. That's why I configured the penalties to only cause chest pains for all the slaves staying in the village at night.
“ “Waahhhh! He-helpー!” ” (Runaway slaves)