Haha, your choice in emoji gives away your age in any case.

Note that HN doesn’t support Unicode in comments, so plaintext emojis are the only option.

The point might have been that with access to emojis (on other platforms) youngsters no longer use the oldschool emojis. Use of oldschool emojis strongly suggests oldschool poster :)

Use of the word "emoticon" instead of "emoji" would also be a strong indicator :)

Some Unicode works here — like the preceding em dash and the hair spaces around it, along with bullets:

• One

• Two