Let me tell you a story:

My sister passed away about 5 years ago following a bone marrow transplant. During the last year of her life, she kept an very active online journal about what she was going through with lots of interaction with hundreds of people who cared about her and followed her story. That online journal is still there, 5 years later, and while it may be painful to come across at times, it is also a gift and reminder that she was a very vital, living, thoughtful human being who went through a great struggle. I am SO grateful that the website that sponsors online journals such as hers (it is a website specifically designed for people undergoing health crisis) doesn't just delete those accounts when the writers have passed away (and many of those posters do die). Seeing her words now is a blessing.

I can see if a member's last few posts were full of thoughts of suicide or something and they had ended up dying in that manner, then it would certainly make sense to at least delete those posts, but that wasn't the case for the member you mentioned. She was a vital member of this community and while it may be painful to see her words right now, the time will come when coming across her old posts will be a gift -- it's just hard to see that right now.

Grieving is difficult and memories and reminders come up at unexpected times, but it does get easier and the reminders do eventually turn into little gifts from above (at least that's the way I've come to see them.)