[cwkoss]

Probably-not-ethical study I'd like to try. Pick two innocuous subject that somewhat uncommon. Pick a group of target accounts, randomly divide in two, assign each group of accounts a 'target subject'. Whenever you see a tweet from one of these accounts that mentions target subject, have a bot network like the post. After running experiment for a period, measure whether the relative frequency of posting about each subject is different between groups.

Would be interesting if previously unrelated accounts in same targeting group would find each other. I suspect you could make a weird cult of 'asparagus enthusiasts' or something if you worked at it.