The FCC has fined the Marriott hotel chain for blocking guests using personal wireless devices - specifically, MI-FIs. This should be a warning to those who simply turn on WIPS (Wireless Intrusion Protection) without really understanding the consequences.
WIPS is included in many enterprise wireless solutions, including Aruba Networks, but need to be used thoughtfully, against true security threats. Many users simply enable the auto-mitigation features and hope for the best. A better way would be to use the WIPS monitoring and alerting features and be notified of a possible threat. Then a real human being can decide if this is a true threat that needs to be mitigated, a false alarm, or in the case of the Marriott, something that should have been ignored.