I was wondering if there was a way to only show the most recent comments under a person's profile - say 3 or 6 months. While we were still planning the reunion, it was fine showing them all. Now that the reunion is over, some of the profiles are REALLY long and the old posts have little impact as no one goes back that far.

Unfortunately no. The profiles are built to dynamically load and bring in older content as you scroll down the page.

Art-
I also asked for this and received the same answer.

I make it a practice to go in and delete the oldest posts until I have about 6o days of posts remaining "live". It's a little time consuming but once you've cleared out many of them it's easy to cull the posts regularly.

Unless there's a very important or interesting post in which case I let it stand.

I haven't heard anything negative from my classmates & I've been doing this for 2 years.