If they were using a specifically Friendica-compatible app, of course, but since we're piggy-backing off of the Mastodon ecosystem, I believe we have to take Mastodon behaviors into account.

Last but not least, many Friendica users (myself included) come from other platforms, whether it is Facebook, Twitter or even... Mastodon possibly. And all of these have in common the same behavior for blocking. So we just can't expect Friendica users to know exactly how blocking works in Friendica since it's different from every other social media platforms. This discrepancy is fine in the Friendica frontend where we can spell the actual behavior for users, but it is different in the Mastodon-compatible (or Twitter-compatible) apps that we can't control.