Asking for handles and passwords is only done as propaganda for the fear regime.
They don't need your facebook account to see if you're against the government or not. They can figure that out by your credit card purchases, by the movies you watched, the pubs you went to, your mac address during the last protest, or god forbid by that anonymous mask you bought on amazon.
Heck, with virtually no posts of my own, facebook concluded my political affinity just by the handful of people I friended. The pre-cogs can figure out when you're going to snap, before you even think about it.
The act of asking is mainly to assert their authority and to promote more fear.