I read an article today where a someone (not the article author) commented that the Hanyu fans were "crazy." I'm a terrible spectator and an even worse fan: I pick my favs each season and root for them, but I don't do anything other than cheer for the occasional competition I watch on TV.
It seems like the Hanyu fandom is on par with the other elite skater fan groups for dedication and zany-ness, so I'm not sure why they're being singled out for being crazy, but ymmv.
I started thinking about it and comparing it to movie, tv and music stars. I've noticed a very-good trend among younger stars: they redirect that energy into healthy, positive channels. One actor supports a cancer charity and ask his fans to participate and donate to that organization. Another started on online fitness program that also support charities and promotes healthy lifestyles. Dolly Parton is incredible, with all she's done for her community/state plus starting a children's book donation nationwide.
I know that these skaters are young and probably dependent on their parents but maybe this is something they could do for their fans, who are also young. Maturity gives most people the ability to step away from a confrontation, in fact, that's how this message board started - someone decided to go it on their own.
Just thinking out loud: instead of tossing stuffed animals, maybe they could volunteer at a children's hospital, which is where many of those toys end up.