Oh this would be great!! +1
I’m fine keeping all of the activity content in my feed, but I’d also love to collapse owned/read/wishlisted for 2+ items in a short period of time. I add read there because new users will sometimes come in and then add everything they’ve read all at once and it had the same issue of spamming the feed for a while.. I imagine that there aren’t a lot of times people are marking a bunch of things as read all at once unless they’re filling out a newish profile.
