The Anthrocon policy is fucking hilarious and I love it. Like Realhat mentioned above, the very concept of any human skin shown while fursuiting used to be EXTREMELY taboo in the fandom. You just couldn't do it. You'd be straight up told by staff you are "ruining the magic" (always found that term a little dumb, but whatever) and asked to go to the headless lounge (named that for this very reason) to put on/take off stuff. Hell, even those were policed and I remember conventions with staff guarding the door and forbidding anyone who wasn't actively carrying/wearing a fursuit from going into the headless lounge at all.
The Anthrocon heads of staff are basically the boomers of the fandom, almost literally given their ages, so it makes sense they'd remember this. That, plus the fact they are already attendance capped means they don't have to cater to everyone to drive more registrations like every other con. They are in a perfectly comfortable position where if people get offended and fuck off to another con, there's another person right behind them willing to take their spot and they lose nothing.
Also while typing this I am reminded of my own av. Picture was taken at Anthrocon, of course. Even the notorious Carpet Samples can meet the rules of this new policy, what's your excuse?
Nah. If anything this will reduce problems because the parade will be significantly shorter. As someone pointed out above, it is supposed to only be an hour long but because of all the non-furry costumes and lazy "I'll just throw on the head and walk around", it took 2+ hours instead.