At the end of last year PlusNet moved those who used excessive bandwidth to a separate pipe, Tiscalli have gone further and are removing 500 users who overstep the mark.
The bandwidth "hogs" as Tiscalli call them have been ordered leave, but can do so without penalty.

It's claimed that these users regularly download between 30 and 150GB per month, as opposed to the average of 1GB for the rest of it's customer base, resulting in 1% of users using 30% of it's total bandwidth.
Tiscali UK has recently changed its Ts&Cs and issued a warning all 350,000 broadband users that they now have a 30 Gig a month allowance.

It is also revising the advertising campaigns, removing the word 'Unlimited' although it claims "for most customers their experience will that of an unlimited service".

Who will be the next ISP to target heavy users? Time will tell...