Ralph is something else, so on one level there is just the fact this is a blatant threat he is issuing over a ban happy platform. A platform he relies on to help drum up interest in the show he runs as his primary source of income.
On another level, and I'm not a Virginia lawyer of any sort so someone tell me if this is completely fucking wrong, you could interpret this as a form of witness intimidation given its relating to Riley and things he's said as part of the trial with May's stalker.
Beyond even that, Ralph's fight with Riley didn't exactly show Ralph bowling the guy over. You can't say either of them won, both had people come to their aid, but Ralph was gassed within seconds of Riley lunging at the guy. I doubt Riley or any of those weirdos are more scared of Ralph after that performance, if anything it just showed what a impotent manlet he is.
Finally, just thinking about it:
Ralph's pregnant girlfriend's alleged attempted abductor was on trial, and this according to May effected her greatly and made her feel vulnerable - so vulnerable she needed a morbidly obese alcoholic to protect her. Instead of staying with her, making sure she gets through what must be a stressful period of her life, Ralph runs off to Vegas to gamble, drink and tweet threats at other people who may have been witnesses in the case. I actually can't fathom how selfish and monumentally stupid Ralph is.
Every single opportunity Ralph has to show even an ounce of maturity, foresight or selflessness he fails to do so.