... Edit: I should have looked at the rules. In fact the ref can award the game (= match at snooker) to the opponent for a first offense if bad enough. see below
SECTION 4 THE PLAYERS
1. Unsporting Conduct
(a) In the event of
(i) a player using offensive language, or making offensive gestures; or
(ii) any conduct by a player which in the opinion of the referee is wilfully or persistently Unsporting; or
(iii) any other conduct by a player which otherwise amounts to Unsporting Conduct; or
(iv) any player refusing to continue the current frame;
the referee shall Warn the player that in the event of any further Unsporting Conduct the frame will be awarded to their opponent,
(b) If the referee has Warned the player under (a) above, in the event of any further Unsporting Conduct, the referee shall award the frame to their opponent, or, if this happens between frames, the referee shall award the next frame to their opponent, and the referee shall Warn the player that in the event of any further Unsporting Conduct the game will be awarded to their opponent.
(c) If a referee has awarded a frame to a player’s opponent, under (b) above or (d) below, in the event of any further Unsporting Conduct by the player concerned, the referee shall award the game to the player’s opponent.
(d) In the event that the conduct, in the opinion of the referee is
sufficiently serious, the referee shall award the frame or the game to the player’s opponent, even if previous Warnings for Unsporting Conduct were not issued.
(e) Any decision by the referee to award a frame and/or game to a player’s opponent shall be final and shall not be subject to any appeal.