Why is this such a problem?? When the official candle lighting time comes people who seek to make the observance should just sign off and forget that the computer is even in the house...
Excellent point. If only Jews were all so committed. I think Chaim's main point about this issue was that he knows (as we all know) that there are many Jews who do not commit themselves to guarding the Shabbath, and they will surely post on the forum if given the chance, since they are probably on the internet anyway and doing any number of things on Shabbath. (of course some of our great Jewish members are committed to the halacha and so they wouldn't think of being here or on the computer!) So he doesn't want to be aiding and abetting or be held liable for each sin that such a Jew would commit by clicking around and posting on the site.
Is it a sin for the JTF site to remain on line during Shabbat? Many other Jewish sites remain on line so it must be a preference rather then a requirement.
I'm not really sure what to think about it, but Chaim has probably asked his rav or analyzed this situation himself and come to his conclusion. I'm not 100% sure what I would do if I was running the forum, but I respect his decision. I know for instance that when I was in Israel, our rebbeim told us that since the time was ahead of the US by several hours, we should not email our family motzi shabbat (sat nightfall) while it is still Shabbat in the states in case they might write us back while it is shabbat for them, and we should wait til their shabbat is over also in order to contact them because we'd be implicated in their avera even tho they dont know much about halacha or dont follow it, it would still partially fall on us if we cause them to reply during shabbat.