All Blizzard needs to do is expand on the class tagging they did for DS gear. There is absolutely no reason for a shaman to roll on leather at 85.
I came across someone doing this in a rdf today. Sadly they were from my server which is mankrik. So i ignored them on my main 3 toons i play. Not sure if your ignore list matters when it comes to rdf though.
Global Ignore List is a really nice addon, you get more than 50 ignores (default cap) and can set a note for why they are on ignore. It also warns you when they’re in your group if you have them again in the future. It’s really handy when you bump into these types of people on an alt because it works across all of them.