Well to be honest, vast majority of today's registered breeds were created by crossing two or more other breeds to get another new breed. So, honestly, I do not see anything bad in creating a new breed IF it's done properly. This means no experiment BYBs, no playing blindfolded etc... Done properly meaning thoroughly research genetic issues pros and cons, picking the best of the best, and of course, not culling in a process. But unfortunatelly as it is nor regulated by law, it's open to everyone so for that reason I kind of disagree with it.
Respect and you shall be respected. Animal is always right.