"Nothing to hide" is one of the stupidest things you can say.
Pretty mean. What if s/he really has nothing to hide? I mean, we do some things in public on purpose. For example, the blockchain is shared public info for a good reason. Perhaps this poster simply has good reasons to do their internetting in-the-clear (or behind an insecure vpn).
You shouldn't support such things in any way. When people do a bad job, don't pay for it.