Given: You support a coffee shop and have recently installed a free 802.

In public hotspots like coffee shops, the best way to reduce legal risk is to require users to acknowledge an Acceptable Use Policy (AUP) via a captive portal before granting network access. This approach:

Provides a legally binding acknowledgment that users agree not to misuse or engage in criminal activity

Maintains an open venue while limiting liability

Other options, like using WPA2-Enterprise or blocking ports, are either impractical for public use or ineffective at reducing underlying legal exposure.