You know how Facebook statuses used to have the "is" automatically? So basically, it had to say "Firstname Lastname is..." even if that wasn't how you wanted your sentence to be structured.
Well it hasn't been that way for a long time, so it gets on my nerves so badly when people put the "is" in there unnecessarily.
"Firstname lastname is man, that was a terrible game" makes NO SENSE. You can just say "Man, that was a terrible game." Or if you're super worried about making it a sentence, just say "Firstname Lastname thinks that was a terrible game."