I've been in two VGCs, one in 5th gen and one last year. The first one I don't think was even policy to check for hacks, but with the latter they had been planning to check Pokemon used (the signup sheet also required you to put down your team).
But they ended up with so many people turning up, more than they had planned, so they ditched that and also revised the competition to make things run faster. Understandable on their part (because it still went for ages!), but still no checking of teams.
That's good to hear, hopefully the future articles will entertain as well!