Smiley means nothing in the context of your actions.
Many trolls over the years have thought that using smiley would hide their intent.
As a matter of fact, I’ve found the majority of the smileys associated with posts have been put at the end of a post that is inflammatory or insulted to the person being responded to.
Posting a smiley like that is more of an indicator of trollish behavior than about anything else I’ve seen.