I personally find equal style explanatory signs confusing. This might sound like a bad pun, but they literally don’t provide directions and I’d have to consider both expressions and it’s applicability w.r.t. situations and circumstances.

One example that comes off top of my head is Ubuntu installer disc’s “man = keyboard” sign.

I believe it is supposed to read “for universal access = hit any key on keyboard”, after seeing it for years, but for long I thought it could be “A keyboard is to hands and legs for a civilized person” or “use keyboard to see logs” or something.