Yes they will register it - but won't be a problem if it is a "gift" for you (or whatever). Just remember that if this is a student buying it then they are only allowed one laptop and one desktop per academic year.
If your friend is a university student make sure they specifically ask for the HE Institution price as it's a significant difference from the standard education discount (£702.65 vs £750.83 for the base model) and don't forget the £95 ipod rebate offer!
Thanks!
Went in to the apple store today.
And got a 24" iMac 3.06ghz with educational discount Saved £196 and also got a free nano.
They didn't ask for any student card or anything, just had to type a few details into a mac.