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Good idea! The easiest way to do that with minimal modification is to make the "following" field of the format:

@accountname or #tagname

You must have been following our discussion on slack last night on "Mine old feature request that received zero payout and take credit for the idea yourself for profit!" Well done sir! =b

https://steemit.com/steemit-ideas/@tuck-fheman/watch-a-topic