Vonleo and Lstkaws,
Yes it is minimal on how it affects normal players, but that group mentality seeps and spreads on a server.
If you want to run an AK sr in relic+1 DL/AF2 only parties, that's fine, find a LS that has the same mentality and run to your hearts content.
The issue is how these types of people generally treat others with lesser gear or less experience in said dungeon.

Granted this isn't across the board and may not even be the majority, but it's enough that it's seen. These people tend to treat others with less respect and either pick on or bully those that mess up instead of trying to teach and help. It's the attitude that goes along with these shouts not the shouts themselves.

Like I said, these people may not be that dominant but they are more vocal so more attention is given to them. I have come across people that span the spectrum from being a complete douche to patient and helpful, sadly the douche is the one that gets noticed.