solving the demon problem

so suppose domain.com publishes SPF.

but workstation.domain.com does not.

right now SPF tells you to publish an SPF record for every single
subdomain that has either A or MX.  but that's yucky.

but if we add a match_subdomains modifier to domain.com's record, we
can allow subdomain lookups and the problem is solved!

what do people think?

domain.com IN TXT "v=spf1 -all match_subdomains=1"