1) It will be dangerous, why tempt fate? It only takes one irate driver to kill a whole peloton.
2) It's incredibly easy to self-support that ride, so why not do it when (1) does not apply.
I really don't get the whole poaching thing. If you don't need the services, why ride it with a gazillion other (often sketchy) cyclists? Just do it on your own a different day. Or go ahead and ride the event, but pay for it. Remember, water and portapotties count as services too, so if you use ANYTHING please pay the registration fee.
I hope it is a comedy not a tragedy. The newspapers aren't doing anyone any favors publishing that cr*p.