This pops up every year, i think most fans agree if its a spectacular play and they player hasnt gained any real advantage, let it go and let the highlights be there!
Ie when going into the open lane for a dunk, taking the extra step doesnt disadvantage the defense, they are already beat, so let the highlight stand, they are great for the league.
Check out the Kendrick Johnson dunk v the Titans, the last one on the clip, most say if you watch closely he travels,one of the best dunks, especially for a little guy the NBL has seen, so most would rather ignore the travel and let the dunk and highlight stand. Remember pro sport is all about entertainment, lets not stand in the way of these types of highlights.
https://www.youtube.com/watch?v=qpADcR4NRis