Personal lists

I've noticed quite a few lists recently that I'd have left as "Semi Private" if I'd made them as I doubt they'd be of interest to anyone who doesn't know me. Lists like "Watched in 2007" or "Seen Live". How about making the semi-private lists appear in the "Contact updates" feed but not on the main page feed? This might reduce the number of these lists which appear on the main page. What do people think?

It's not that easy to do with the current system but I will think about it for the future.