Most of the negative comments were aimed at the self appointed authenticity police and not the SCA as a whole
As far as showing up in non period kit, that describes 95% of most people attending an American SCA event. I enjoy going to SCA events. But the historical
accuracy is only slightly better than a ren faire (minus the rubber elf ears, plastic vampire fangs, and fairy wings). Most the people run around in cotton T-tunics
and tennis shoes like 2nd rate background players in a home made Xena tribute video that was shot by 8th graders and posted on You Tube.