A responsible player and someone who is good with finances should really be able to have the self control to walk away when they've had enough. A maximum losses block is a poor way to look at restricting yourself, maybe switch to a deposit limit instead, however it does not get around the root issue here - which is that you could simply start up again at a different casino when you reach the limit, so it's the poorest form of defense if you think you have a wasteful or damaging gambling addiction. You need to take a serious step back to reassess whether you should be doing this activity at all, give yourself a break from it if you feel a lack of control has seeped into your play.