Harry's shortest stay at Privet Drive

[JoAnna]

No: HPFGUIDX 93473

Laura:

<<<Yet, I was rereading PS/SS today, and noticed something:

"The train pulled out of the station. Harry wanted to watch Hagrid
until he was out of sight; he rose in his seat and pressed his nose
against the window, but he blinked and Hagrid had gone." - PS/SS Us
ed., pg. 87

*Hagrid* can apparate! HAGRID! Hagrid, who got kicked out of Hogwarts
in his third year, whose wand is in pieces in a pink umbrella, who has
arguably shown less magical aptitude than pre-OotP Neville.>>>

JoAnna:

I always thought that Hagrid had NOT apparated, but merely entered
Platform 9 and 3/4, perhaps to take the Hogwarts Express, or the
Knight Bus, or some other form of transportation back to Hogwarts.  

As for magical aptitude, I'm of the opinion that Hagrid shows quite a
lot considering the level of education he's had (and I sincerely hope
that Hagrid, someday, can somehow get cleared of opening the CoS and
get the Wizarding equivalent of a G.E.D., if one exists).

If Hagrid DID Apparate, however, there's no reason he couldn't have
learned, if Apparition is a Ministry thing and not a Hogwarts thing. 
Unless there was a prerequisite besides being of age (e.g., passing at
least one O.W.L.), there's no reason Hagrid couldn't have gone to the
Ministry and obtained an Apparition license even though he'd been
expelled from Hogwarts.  *shrug*  Then again, perhaps his size is a
factor in is ability or lack thereof to learn to Apparate.  We may
never know unless J.K. tells us, I guess!