So there is an older woman (60+) in our building with a mental disability. If she knows your name, every time, she will stop you and engage you in conversation. Problem is, I have seen her conversing with people but she doesn't really register how to detect when people are busy/in a hurry or want privacy. 

I have also seen her come to the pool and notice someone she knows. This is followed by her sitting down next to them and talking to them the whole time they are there. She will literally stay there with them until the point the person gets up to leave. I have seen this happen to multiple people at the pool too, whether they are by themselves quietly reading or, like I saw one time, writing thank you cards for their wedding gifts. 

Anytime I am around her or end up in the elevator, I am cordial and say good morning if she says something but I do my best to come across as silent and occupied. 

The reason for this post was recently I went to the grocery store where she works as a bagger. I forgot she worked there so, without checking, I entered the line a put a couple items on the belt. When I realized she was the bagger I pretended I forgot something, looked at the person behind me awkwardly and said, "Ah, I forgot something on my list, you can go ahead of me." I promtply then threw all my shit back in my basket and walked to bakery and bought a muffin before finding a register that ensured I would not have to encounter her during my purchase or enroute to the exit. 

I feel kind of terrible about it all but I know if I go past "polite building cohabitation acknowledgement" then she will incessantly be stopping me and disturbing the little peace I get at the pool. 

Also, she hangs out in the lobby *a lot.* I see her no less than 5 times a week. 

TL;DR An old lady with a mental disability is always in our lobby (or at the pool) and stops people to talk if she knows their name. I do everything I can to avoid her knowing my name so I don't have to frequently interact or talk with her so I can keep my peace when I leave/enter my building or when I am reading/relaxing poolside. 

Am I the asshole? 