Alternative wording for an old old page (customize/advanced)

[foxfirefey]

Not linking to the comment because I don't want to bring unnecessary attention to somebody without asking their permission, but they talked about hitting https://www.dreamwidth.org/customize/advanced/ and seeing the warning "Unless you're a programmer or web designer, you should probably stay away from this area" and getting too intimidated to go further.

I think we could make alternative wording that doesn't tell people who aren't programmers or web designers to "stay away", one that's more inclusive--and we have more documentation here that can help somebody out.

What do people think?