>>23351422>says he's been playing since base set and that "I know this game"That's usually bravado.
I've caught players faking seniority by citing deck archetypes from the era they're claiming they started playing in and they either shut their maws, boost the bravado to obscene levels ("cursing", claiming they'll report me for some bullshit after the match, start throwing out random names whilst claiming they know me, and other insane things), or just outright concede the match in silence.