You should be firm with your parents, not rude but firm.
Make sure that they understand the consequences of buying into OEM computers.
Let them understand that the headaches they will save by NOT having to deal with Gateway, or HP or Dell and thier shoddy Customer Service.
I'm a Mac Addicted SOB and I even hate the Customer Service from Apple!!!
If you need an endorsement for your cause have them contact email@example.com
and we'll explain to them the reason why people are getting ripped off byt the OEM's.