Even back when I started, around the ascendency of the WWW when Usenet was still ABigThing™ (though after the start of the Eternal September, I'm not quite that long in the tooth!) there was already confusion with the simple text smilies.
Ignoring the arguments of whether to include the nose (the original form was :-) which I much prefer) on the basic examples, people introduced new combinations faster than I cared to pay attention to so knowing what they meant was not always easy.
It ended up that there were whole dictionary like lists of them in some Usenet groups' FAQ documents.
As soon as you have more than a few of any symbolic representation (text smilies, emoji, gifs/memes[†], ...), it becomes dynamic grammar in its own right and away from the core few it is a mess of people not understanding what you mean either because they don't get your reference or you have used a reference incorrectly (or, if incorrectly is the wrong term, in a manner differing significantly from its common use).
[†] it is less of an issue with meme images/animations as they usually have a text portion making them far less ambiguous, but the issue is still there overall