Well,couldn't see that situation addrssed in hte Laws, except the situations calling for a let. (disturbance potentially affecting outcome of point) Maybe in another are of the rules... ought to be an obvious warning.
3.4.1.5 When a player is formally warned for bad behaviour, a yellow marker shall be placed on or near the score indicator.
3.5.2 Misbehaviour
3.5.2.1 Players and coaches or other advisers shall refrain from behaviour that may unfairly affect an opponent, offend spectators or bring the sport into disrepute, such as abusive language, deliberately breaking the ball or hitting it out of the playing area, kicking the table or surrounds and disrespect of match officials.
3.5.2.2 If at any time a player, a coach or another adviser commits a serious offence the umpire shall suspend play and report immediately to the referee; for less serious offences the umpire may, on the first occasion, hold up a yellow card and warn the offender that any further offence is liable to incur penalties.
3.5.2.3 Except as provided in 3.5.2.2 and 3.5.2.5, if a player who has been warned commits a second offence in the same individual match or team match, the umpire shall award 1 point to the offender's opponent and for a further offence he shall award 2 points, each time holding up a yellow and a red card together.
3.5.2.4 If a player against whom 3 penalty points have been awarded in the same individual match or team match continues to misbehave, the umpire shall suspend play and report immediately to the referee.
3.5.2.5 If a player changes his or her racket during an individual match when it has not been damaged, the umpire shall suspend play and report to the referee.
3.5.2.6 A warning or penalty incurred by either player of a doubles pair shall apply to the pair, but not to the non-offending player in a subsequent individual match of the same team match; at the start of a doubles match the pair shall be regarded as having incurred the higher of any warnings or penalties incurred by either player in the same team match.
3.5.2.7 Except as provided in 3.5.2.2, if a coach or another adviser who has been warned commits a further offence in the same individual match or team match, the umpire shall hold up a red card and send him or her away from the playing area until the end of the team match or, in an individual event, of the individual match.
3.5.2.8 The referee shall have power to disqualify a player from a match, an event or a competition for seriously unfair or offensive behaviour, whether reported by the umpire or not; as he or she does so he or she shall hold up a red card.
3.5.2.9 If a player is disqualified from 2 matches of a team or individual event he or she shall automatically be disqualified from that team event or individual competition.
3.5.2.10 The referee may disqualify for the remainder of a competition anyone who has twice been sent away from the playing area during that competition.
3.5.2.11 Following 4 accumulated failures on any aspect of official racket testing over 48 months, a player shall be suspended for 12 months from participating in ITTF events.
3.5.2.12 If a player is disqualified from a match, event or competition for any reason, he or she shall automatically forfeit any associated title, medal, prize money or ranking points.
3.5.2.13 Cases of very serious misbehaviour shall be reported to the offender's Association.