I sometimes try to do my little share of removing junk from the sites I participate in. One of the things is to remove old comments that were useful at the time, but now only add noise.
Some comments must be judged in their context to see if they're still useful, others are clearly expired without looking any further. For these it would be really nice to be able to delete comments directly in the activity list. Would this be a useful (and doable) feature?