Only thing that may come from it is making kits worse - if bandai would have to reduce costs to keep with bootlegs.
Well, I have to nitpick here...
How can you assume the end result of bootlegging would be inferior product coming out of Bandai? As things stand, Bandai is the only company that can produce injection kits of Gundam subjects. This is similar to a monopoly. (It is not a monopoly only because other manufacturers can, and do, produce robot kits from
other series... But if we want an injection kit of a Gundam or a Zaku, we're buying a Bandai product. There are no alternatives.) Because people want "Gundam" specifically, it is almost as though Bandai has no competition. No matter how much a particular Bandai Gundam kit may be lacking (*cough* MG Zaku F2), no one can step into the market and offer a better alternative, due to copyright law. Bandai, at present, doesn't need to make the best product or offer it at the best price, because Gundam is in demand, and they are the only game in town. Subverting the system is the only way that changes, given that copyright is periodically redefined to last for "more than the number of years since Mickey Mouse was introduced" It seems to me, pragmatically speaking, that the effect of bootlegging would rather be Bandai fighting harder to make their own product stand out as the better choice: producing items at a level of quality the bootleggers can't match. If they were to fight a price war, they would lose, so it seems more likely to me they would stand on the basis of quality.
I don't support bootlegging, I just disagree with your interpretations about its practical effects. I think that even when we don't agree with certain of society's rules, the fact still exists that those
are the rules of our society - and people have developed entire business plans that rely upon those rules as they are. It's unfair to expect "a big company" to play by the rules if we, ourselves, do not.