Definitely don't do anything which makes you nervous - fire is dangerous, and if you focus on getting polyester fur melted into your legs it will probably happen.

Have you considered making a similar style of leggings/leg warmers/boot covers out of something flame-retardant or at least less flammable? It wouldn't look quite the same as the fur, but you could probably make something which looks really interesting and unique and won't put you in any danger. Heavy wool, hemp, cotton denim, linen, etc. are all things which come in fun prints and patterns and don't catch on fire so easily. Steer clear of anything which is ragged or has loose threads or tassels hanging.

Tedward is right about fuzzy-boot meltage not being an issue for most hoopers, but - if you hoop on your knees or feet at all, that really brings up the potential accident factor. Also, even if you happened to be strictly a waist hooper, drops happen... Other people can hit you with their wicks... Personally I'm very anti-synthetic-fabrics when it comes to anything having to do with fire. My two cents, hope it helps.

I agree that you should do what makes you comfortable - but I just wanted to chime in and let you know that I fire hoop with my furry leg warmers all the time, and I've never had an issue. I leg hoop every time I light up and I do a lot of off-body moves, if that eases your mind at all. I also bring a spray bottle and mist my clothes with water (especially if/when I'm wearing fur or fabrics that are questionable).