Not often, but the problem with poor security is that it is vulnerable to the "smart cow" problem. The whole herd will stay in the fence until a smart cow open

Not often, but the problem with poor security is that it is vulnerable to the "smart cow" problem. The whole herd will stay in the fence until a smart cow opens the gate. Then the whole herd gets out. Once a security vulnerability is found, someone will inevitably write a script, hacking tool, or modified app to abuse the vulnerability. Then everyone can use that tool to exploit the vulnerability.