Far as i'm concerned,it is a free market,not your market,not hers,not his,not any one persons.

If i undercut someone by a large amount(and i do quite often just to shift something fast) and they can't deal with it,that's on them.

If you feel the need to rage at a complete stranger over their pricing policy,something is very wrong with you.Chill the heck out.(I do agree with undrecutting by 1 or 2 gil being shady,i don't like that one bit,but i still wouldn't go whisper them about it,it is their choice to do so not mine)

I will change my pricing if i'm competing against a FC member or friend though,but no one else.