sure, maybe 20 years ago in an AIM chat room. Twitter lets you show a birth year so, unlike an AIM chat room, twitter has a mechanism to show age. that's why it made no sense or wouldn't stick out. should be age/pronoun/location in the bio, then it would still fit the format.
A/S/L is such an ingrained thing to the internet I don't get how you think 16 is anything except age here.
sure, maybe 20 years ago in an AIM chat room. Twitter lets you show a birth year so, unlike an AIM chat room, twitter has a mechanism to show age. that's why it made no sense or wouldn't stick out. should be age/pronoun/location in the bio, then it would still fit the format.