Just ignore them. Padding the numbers in epic battlegrounds anyone can do which is all that that person claims they do.
This nerf has really done nothing. Frost is still top DPS and Unholy really isnt that far behind. In raids, not that many people are doing it anymore. Its ran its course. But its dps really hasnt changed and they gained maybe 40k average dps across all bosses but raid participation has basically fallen off a cliff across the board but in terms of max potential the average is pretty far off.
If its about PvP, people werent doing anything really in PvP in the first place. You have maybe 4 people split between 2 specs that do any pvp and its a constant stream of complaints from them. They should just quit because it looks like each and every one of them are looking to just be overpowered. So its best not to put much stock into what they say.