Personally, I don't mind being corrected by whoever it may be, because at the end of the day the only person I listen to is the Sensei.
I am the new member at the local Aikido club, and would NEVER go into that situation with such an arrogant attitude. Besides, I am in no position to correct anyone! I think it's a matter of etiquette more than anything.
If I were in your position, I would speak to the person about this issue, rather than ignore it.
Iain.
