Azkhaban and dementors

[Homero Luna]

No: HPFGUIDX 133433

One of the things that snagged my interest is the issue of the
Dementors  and Azkhaban.  Early in the book we find out that the
Dementors have abandoned the prison (and don't they also say that
most/many of the prisoners have, therefore, escaped?).  However, we
also see several references to Lucius Malfoy and Stan Shunpike being
held in Azkhaban.  I believe it's Dumbledore who even says that Lucius
probably feels safer in Azkhaban, given LV's displeasure with him.

How/why are Wizards even being sent to Azkhaban w/o Dementors to guard
the prison?  The wizards have their wands taken away, and therefore
can't "Alohomora" their way out so easily, but there's still the issue
of emotion-driven magic.

Surely a very-ticked Lucius could bust down a wall or two without his
wand.

Best,
Homero