Not naming names, but there's an entire group that drives me - and most of my group - mad.
Here's an example of why, and I'm gonna get hella mad here over something little.
Ignoring the modern black (HGGGNGGH) leather glove, take a good look at where his finger is.
These guys do 11th through to 13th century stuff, fingering (dohoh) the blade is a technique developed in 15th century Italy in order to get more control over the blade when thrusting. The italians, being more sensible than the chap whose hand that is, stuck finger rings on their swords and generally added a blunt ricasso at the base of the blade (you can put your hands on a sharp blade just fine, though, as long as you don't try and jerk it off)
Arming sword with finger ring
Black leather is something you only have in the medieval era if you're about as rich as the catholic church, and even then it's not the same black as modern stuff. One of our knights has his boots about as dark as you'd probably get them, but I ain't gonna go around taking photos of peoples shoes.
Don't even get me started on their 13th century gear.