I think calling for LB is very normal. Everytime I raid, our raid leader call out everything including LB (which I did a million times and he still called out). At the end he said, it was just a routine call - no offense. Also, calling out LB can remind others to look around for example - we ran Shiva ex and our melee died. Tank call out LB - but nobody did LB - we forgot the Melee DIED - mage LB right away . I wouldn't take the LB thing too serious and personal. Sometimes just a routine call. Plus a lot of DPS forget and sometimes Tank call out cause they know when the big attack coming or when they will move the Boss - they probably are the best to judge when LB should go out.
A lot of times - if you are new to the dungeon, just tell people Hey i am new - be gentle. They would say follow this person or do this and do that.