Ageism at Research Conferences

BTW: What is going on? In the past few months I've seen a whole slew of CFPs (academic calls for papers) for conferences with interesting titles aimed at young researchers. I don't object to encouraging young researchers especially, but I do object to ageism. To ask for papers only from young researchers seems divisive and incomplete. I know the establishment is a problem - it always is - but surely there must be a better way to encourage young researchers than excluding contributors!