Personally I do not mind if someone needs to vent, I'd rather it be here than to children, or spouse. We all get irritated at times, and some do not have anyone to vent to. I know that one of the LQS's has a lady who just grits on my nerves, so I try to go there when she is not working. Others like her a lot, but she just rubs me wrong, so I avoid contact.
My take is, if I read the first post and nothing grabs me, I just go on. I may just respond to the first post instead of reading what everyone has to say. Mostly due to not having the time to read all the posts.
Lots of times I just thank God I am not walking in that persons shoes.
So put on a smile, put on some good music and sew.