Different people may need different advice. 

Python and open source have always been more about thingslike inclusivity and diversity than about excessive political correctness. I'm sure the historical concepts of master/slave were so distant to the handsome young men that developed the computer science concepts that they didn't expect to cause any naming conflicts. 

To avoid forming any unnecessary taboos and making things more fragile than they actually are, I'd like to point out that a computer was is the perfect slave, and that code that causes harm to others is the perfect <insert word "ugly" here>.

Don't judge the use of a single word. Look at the words next to it – and the wider context. If you still think the wording itself is harmful, consider doing something about it. And if you think the background of some people makes it difficult for them to understand the context of a word, consider helping them out.

If you can't tell inclusivity/diversity from political correctness, or dirty words from dirty bytes or from unfriendliness and intolerance, you'd better go fuck yourself. There's nothing interesting here, anyway ;-). Or at least it my be a good idea to be somewhat careful.