The classic one-two punch of Internet Overcharging is to limit your broadband usage -and- throttle speeds downwards.  AT&T wireless customers in several major cities across the United States are experiencing that for themselves over the long holiday weekend, reporting upload speeds have been throttled down to 100kbps or less (one-tenth of the speed most customers enjoyed as late as last week).

Speedtest.net has shown AT&T network throttling in many parts of Baltimore, Boston, Cincinnati, Cleveland, Columbus, Denver, Des Moines, Detroit, Fairfax, Houston, Kansas City, Las Vegas, New York, Orlando, Phoenix, St. Paul,  Salt Lake City, and Washington, D.C.

The speeds are so noticeably slow, it has become a national story as irate customers find their wireless broadband service first usage capped at just 2GB per month, and now upload speed throttled to the point of unusability.  AT&T promised a statement explaining the issue, but one has not yet been forthcoming.  Some speculated the throttles were designed to reduce congestion on AT&T’s network over the holiday, while others suspect a technical fault.

Reducing your wireless speed reduces the impact on AT&T’s backhaul network, which in turn reduces congestion and the number of dropped wireless calls.

The introduction of speed throttles for “heavy users” is a favorite in countries where overcharging schemes predominate.  Most permit a preset amount of traffic to pass at normal speeds, but once customers exceed an arbitrary allowance, a temporary speed throttle gets applied to dramatically reduce speeds and discourage further use.  Some limit customers to a selected amount of traffic per day, others per month.  Once the window expires, the throttle is automatically removed.

While there is no indication AT&T is applying such a throttle at this point, the company has strongly opposed efforts to ban such schemes.  AT&T has a history of antagonizing its wireless customers with poor network performance, and has been judged the least favorite provider by Consumer Reports.