Firstly, they are masking latency in scoreboard, not ping. Secondly, it simply doesn't matter. If you want to see their ping type 'ping' in console. The command is considerably more accurate than latency, as it appears in the scoreboard, since latency is seemingly averaged.
Steam Wrote: 4:02 PM - George, of the jungle: was out
4:02 PM - George, of the jungle: bison, dude
4:02 PM - Brawl Bashin’ Bison: ???
4:02 PM - George, of the jungle: you're very rude towards alina
4:02 PM - George, of the jungle: how about unbanning her friend?
4:02 PM - George, of the jungle: I mean
4:02 PM - George, of the jungle: it's only gamebanana skins
4:02 PM - Brawl Bashin’ Bison: LOL
4:02 PM - George, of the jungle: ^^
4:02 PM - Brawl Bashin’ Bison: LOLOL
4:02 PM - George, of the jungle: lol