Why do we even need a Ball/Angolan hybrid?
Is there not enough genes/morphs in python regius already??
Hell, maybe everyone should figure out all of the genetics of our current morphs before we consider 'muddying' the genetic waters with Angolan hybrids??
What's to stop someone from selling animals descended from an angolan hybrid as aberrant BALL PYTHON albinos? Aberrant pastels, aberrant spiders or whatever the morph may be.
What's to stop someone from selling the hybrids as some new wild-caught morph??
I keep a few balls, but concentrate most of my efforts on my beloved cornsnakes. Quite honestly, every cornsnake I add to my colony is possibly a descendant of a captive intergrade with a Great plains rat snake or a desendant of a jungle corn (california king X cornsnake).
Jungle corns are the most common corn hybrid available. They are available in normal colouration, amelanistic, anerythristic, snow, ghost, motley, etc, etc. Some of the 3/4 corn, 1/4 king animals look close enough to a pure cornsnake that they could be easily sold as an 'aberrant' corsnake to an unsuspecting/uninformed buyer.
And I'm just talking about cornsnakes, ranging from $25-500 or so.
Now, how would you feel if you bought a ball python for, oh let's say, $2500 and come to find out later that the breeder you bought from keeps or breeds angolan hybrids. Could be that the animal you bought isn't a pure ball python. The breeder could say it's pure, but how well do you trust him/her?
So, hypothetically, you have a hybrid albino. Do you keep it as a pricey pet and take a $2500 loss or do you breed it into your Ball lines and sell the offspring as pure or hybrids?
Just imagine you payed a little extra for a high end morph (gen. stripe, lesser platinum, etc,) because it has a unique aberrancy that, unbeknownst to you, is the result of hybridization or angolan blood in the lines.
Take a $25,000-35,000 loss or breed it and keep hush hush about its ancestry??
For some hobbyists, myself included, it's as simple as 'never buy from anyone who deals in any hybrids.'
Just my 2 pennies. 
BTW, you might not see much talk of the angolan hybrids on this forum because not everyone who keeps balls (myself included) likes them. Try the 'Hybrid Discussion' forum.
BB