Customers who download too much, will be given several chances to adjust their usage behaviour before speed restrictions are applied to their service.
I am a first time offender, speed restrictions now in force.
One e-mail, and only one, restrictions now in place with threat of 24x7 shaping forever.
If they do what they say fine, warn me and give a chance to change. Don't go off at the deep end and alienate your user base by making massive threats after making changins to T&C's with little or no announcement. Unlike the massive fair usage splurge that never happened.