F.B.I. Seizes Web Servers, Knocking Sites Offline 
Pro-Tip – when you are using a CoLo for your servers:   * Make sure you failover to servers in a separate cabinet.
   * Better yet, make sure you failover to servers in a different data center.
   * Best Possible – Configure a task to switch your primary and 
     failover environment from data center to data center
     once a week at random times.  Or eliminate the concept of primary 
     and secondary altogether.
  
Who knows what others servers are located in the cabinet you are sharing.  The good news is your mitigation process also becomes a first class disaster recovery plan as well.