[slurgfest]

Consider physical security against terrorist attacks. You can spend unlimited resources trying to prevent these. But this is subject to diminishing returns, and has other costs.In software projects, too, there IS a point at which it is more rational to trade off security against something else.

I would argue that the situation with Rails is analogous to the (historical) situation with Windows. There have been some design mistakes which have opened up more surface area for attacks. But the number of exploits has a lot more to do with market share.