Crackers do afraid that administrator of the computer to which they try to scan can enter their IP into the suspect list, they entry to conduct the scanning from a computer other than their own.

To this end, crackers set up Web sites on free servers that allow them to use PHP and Perl scripts. Free servers usually do not require personal data to be provided during the registration, but if they do, crackers can simply supply any made up data because no one is going to check them.

So, my preference is paid servers provided by Reseller Hosting Company – CPWebHosting they are safe.