The Premier League fixture was Cardiff's first since death the Argentinian striker's body was formally identified by an English coroner on Thursday, a day after it was recovered from underwater wreckage in the Channel.
Southampton said they would work with Hampshire police to identify individuals who made indecent gestures towards Cardiff supporters.
David Ibbotson of North Lincolnshire was flying the Cardiff City player from Nantes to the United Kingdom when their plane crashed near Guernsey on 21 January.
On the page, the family of Mr Ibbotson, from Crowle, said: "As a family we are trying to come to terms with the tragedy and the loss of two incredible men".
Argentine footballing idols Diego Maradona and Gabriel Batistuta also paid tribute to 28-year-old Sala.
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Following Southampton's 2-1 defeat, the club said they were taking "an extremely firm stance" over the incident, which took place during the game.
Having signed for a Cardiff record fee, Sala was travelling to Wales in a light aircraft which vanished north of Guernsey on January 21.
In a later interview with French newspaper L'Equipe, Cardiff chairman Mehmet Dalman indicated that Nantes had sent an invoice for the first instalment, worth 6m euros (£5.27m).
A minute's silence had been impeccably observed as part of the tributes before kick-off at the game, which the Welsh side went on to win 2-1 with Kenneth Zohore's dramatic goal in the third minute of stoppage time.
Cardiff manager Neil Warnock said: "He was a very good lad, a really nice lad".