You'd only recommend? Asking permission is more of a MUST. Even if you're the administrator of a network of computers you absolutely should ask whoever owns those boxen for permission. Ask them in person. And get the consent written, signed, and dated on paper and file it in a safe place.
Seriously. I recall a story about an administrator getting sued and/or fired for installing SETI@Home on several computers he administered without proof of permission to do so.
The statement (understandably) looks unclear, but he's not using the word recommend in the loose sense you're implying. He really meant it as "I'd recommend asking permission in order to install the program in screensaver mode on a workplace network and have it process WU's for Team OCREMIX."
Yeah, that was poor wording on my part. I meant what LT wrote.
Actually, I'll ask my dad if he could do that at his workplace. We'd really get some WU's pumping out then