First, what you want to happen, won't work. Bandwidth aggregation won't work across multiple APs unless there is a common aggregation controller behind them.
Secondly, and more importantly, if you don't have permission to be on an AP, by accessing it you're committing a crime. In some states within the US, such access is a felony. The lack of any security settings on the AP doesn't matter; whether or not you have permission does matter.