Agree, this is a huge pain point when dealing with multiple clusters. I wrote a wrapper for `kubectl` that displays the current context for `apply` & `delete` and prompts me to confirm the command. It's not perfect, but it's saved me a lot of trouble already — but encouraging other members of the team to have a similar setup is another story.

Here's the script (along with a bunch of extra utils): https://github.com/pch/dotfiles/blob/master/kubernetes/utils...