Abuse information is only working for .com .net and .org
In short, non usa sites, the abuse information will not work. (those domains with country codes appended.)
Eg. www.yahoo.co.uk
www.yahoo.com.sg
www.news.com.au
I understand that it is due to the abuse.net database do not support such information. One suggestion is to capture the "email" field in the information gathered, and present it to the user as *POSSIBLE* abuse email address.
Keep up the good work !!