My advice: go ahead with what you're doing until you realize you're wrong.

We really want to serve our customers in the best possible way we can, but really unfortunately, fulfilling unreasonable requests isn't a sustainable measure of customer service.

Again, we make profits regardless of your profits and losses. We lose money (or potential profit) in two cases:

1. Someone is unhappy about Bitcoinica and left us.
2. We're unable to liquidate a huge position in case of market volatility and result in negative balances (which are permanent debts 90% of the time).

What we have always been doing is to reduce these situations as much as possible.

EDIT:

Generally, it's obvious that the more people making profits on Bitcoinica, the better for everyone. We're never against you.