Based on over 30 years' online experience (dating back to the pre-Web ARPANET / USENET days ...) I'd have to say ... Only if 'fun' encompasses the bruised feelings, arguments, and flame wars that motivated the use of emoticons in the first place. I was 'there', and nobody called it 'fun' at the time ... I can assure you this proved to not be the case even when the online population was essentially limited to relatively educated textually adept (i.e., literate) professionals and academics communicating under little or no time pressure and with almost no means for remaining anonymous. It's gotten progressively worse since then, as the online population has expanded to include users with the attention span of gnats, the expressed emotional maturity and literacy skills of a child, and a mania for immediacy that prioritizes speedy responses over thoughtful substance. All these factors have been amplified / aggravated with the arrival and proliferation of mobile accessibility.