I will never understand that argument.
First off, most of my friends go to NCSU and a lot of them don't even pull for the Wolfpack, they pull for UNC or Duke.
Second, a lot of people pull for schools based on where their family went and where they want to go.
Third, your argument also implies that none of us can pull for the Panthers because we will never play for them.
I am just stating facts, I don't know any of my friends that attended NC State that don't pull for the Pack. In fact 2 of them were unc fans growing up and when they got to campus they changed their allegiance to State.
I have no problem with people pulling for a school they didn't attend, like I said before it's easy to pull for a school like unc that has a history of winning compared to Nc State so that is why I say most Nc State fans actually attended that school.
Lastly your argument about pulling for the Panthers is like comparing apples to oranges, it doesn't really make sense.