Fencer: There are three scenarios Puupia is reffering too.
Case 1: Unable to go All-In mid-hand - In this scenario, if someone is in the middle of the hand he is unable to go all-in if he holds less than the Big Blind in his stack. This prevents players from making that little bit of extra money when they hit their hand after betting has dwindled their stack size. Their bet will mostly be called, so when someone gets a monster hand, they'll be slightly miffed that they can't go all-in.
Case 2: Cash Games - In this scenario, a person sitting at the table who has lost most of their chips still has an all-in move available pre-flop (For instance, in 100/200 blinds a person with 190 chips can sit around for one round waiting for a good hand, then try and triple up). In this instance, the person would be well advised to get out with their remaining chips, as any all-in move holds absolutely no clout and they will most likely lose their chips. BUT, that decision could be left up to them.
Case 2: Tournament Play - When tournaments come into play, this will become a VERY big problem, as someone with less chips than the big blind is by the rules of tournament Hold-'Em STILL a part of the tournament, and their chips are still in play. In the situation where someone is kicked out, we have two breaches of the rules. First, they have been unfairly eliminated, as by the rules they are still in the game (albeit with a very slim chance of winning). Second, their chips are still in play, and if that 1000 in chips (Assuming 1000/2000 blinds, not uncommon at the end of extremely long tournaments) is taken out of the tournament, it becomes unfair not only to the player eliminated, but to those remaining in the tournament, as they are deprived of precious opportunities to improve their stack size with very little risk.
I hope this clarifies things, and as an aside I would like to say that I think your poker implementation is very good, especially for a first attempt on this site not only for a game different than a board game, but also for a live play event. We all understand your efforts, and though it is not often expressed, your work is very much appreciated.