[nitwit005]

Plumbers will absolutely refuse work. You can just go to /r/plumbing and see discussions of it.

People in just about every profession get asked to do things that are illegal, unethical, unsafe, or impossible.

[devjab]

Plumbers do have the advantage of being third parties though.

As a side note, I have no idea what you mean by /r/plumbing. Is that something that I should know?

[skydhash]

The “plumbing” community on reddit. That’s the naming scheme reddit uses.

[pnut]

That's how Reddit is organised.