I think the club and Robbo should accept the decision and move on. Some reasons why-
Players and officials are different. Players are multimillionaires but officials are "normal" people trying to do a job. This man's career could be ruined by this incident.
It's in the long term interest of the club to let this drop. Spending the next few months creating a drama will only give us a bad reputation with other officials and may affect their future decisions, either consciously or unconsciously. Jürgen's team have had a reputation for playing fairly. Obviously we have a few players who go down a bit easily (mostly Mo) but all clubs have some players like that. We generally we don't get involved in dodgy practice as much as other teams.
It was a moment of stupidity by the linesman. It's reported that he's spoken to Robbo about it and they both are happy to move on. That's a good outcome for me.
I broadly agree and said at the time it should be put to bed fairly quickly. Players have a much higher bar. What pisses me off is sly arse Kane feigns injury and dives and gets away with it.
But may be a token 1 match ban wouldn't be too harsh. On the conspiracy school front , if Lino had gone within 5 yards of His Highness Lord Sir Harold Kane his arse would be running the line in the Vanarama National League..