Which? Encouraging him to do something that may be illegal, or pointing out that it may be illegal?

No. Vastly and incorrectly overstating the risks involved in cycling in a thread where it was originally suggested as a less "mugger-friendly" (let's throw a few more of those nice politically correct usability phrases about, shall we?) alternative to walking, presumably in an attempt to encourage Simon to live his life according to someone else's notion of common sense.

In somewhat less rancorous vein, your urge to look out for the welfare of those less fortunate than yourself is admirable; however, I can't help but think there may be more productive situations in which to attempt to educate your audience on the evils of drink-cycling than in discussion with a group of intelligent, independent-minded and well-informed alcoholics adults who also happen to be habitual cyclists..