I personally think this should be taken care of as say they get there hands on a page, lets say a huge band with 1 million followers.
They can simply make up some bullshit about a new music video and such and suddenly have a botnet of 100,000 at least.
This does not only effect rare twitter names or known figures on youtube but the everyday computer user as well.
It would be pretty cool to get your hands on a nice twitter name, but a security hole is a security hole and it should be fixed.