"Who to follow" or "whom to follow"?

Twitter has a "who to follow" button on the upper side of the screen. Shouldn't it be "whom to follow"?

Wikihow suggests that whom is the correct usage in a case like this.

Whom to contact is the standard way of saying that. This was amply discussed in many cases on this site, including there and there.

Let's start by taking the truncated phrase and expanding it to a longer more recognisable sentence, while comparing it with another example of the same structure.

What to do - what is one to do? - what should one do? - what should I do?

Whom to follow - whom is one to follow? - whom should one follow? - whom should I follow?

Here, the answer would be 'you should follow her/him', which means that the 'whom' in the question is referring to the object in the answer.

That makes 'whom to follow' correct, since 'whom' should be used in objective cases and 'who' in subjective.

(since the title 'whom to follow' is not given a question mark - it could also be expanded thus, though it is a little more complicated than the example I gave at first:

What to do. - what one is to do - what one should do - this is what one should do - one should do this - you should do this

Whom to follow. - whom one is to follow - whom one should follow - he is a person whom one should follow - one should follow him - you should follow him

again, the expansion resolves itself with 'whom' referring to the object.)