So it impacts the DAO and potentially impacts other deployed contracts (we don't know yet). It's an issue with Solidity because it doesn't even do static analy

So it impacts the DAO and potentially impacts other deployed contracts (we don't know yet). It's an issue with Solidity because it doesn't even do static analysis to give the programmar a warning. It's not that programmers actively avoid doing this or are explicitly warned to not do it. When real money is at stake the language design needs to be a lot more careful.