The subtext could hardly have been more explicit had it been daubed by a graffiti artist rather than an ultimately hard-headed soccer man.
On the field Gascoigne was so often the kind of dream Rooney was when he illuminated the drizzle of east Manchester. Off it, he became impossible to work with - even for a man as sympathetic to the pressures on a soccer celebrity as former England manager Terry Venables - and a permanent magnet for distracting attention.
No, there was not a fatted calf for the prodigal son in the moment of his latest glory.
There was only the inevitable acknowledgment of the quality of what everyone had seen and the clear implication that it will take more than sporadic brilliance to mend a seriously damaged relationship with his manager, one which will almost certainly be the most important he is ever likely to have as a professional.
When Rooney is as good as he was against City, of course you have to head off to somewhere like Barcelona or Madrid to see better, but when he is bad, as he was against Newcastle last week, you have to go just as far to see worse.
If Ferguson was less exultant than he might have been yesterday after a huge lifting of immediate pressure, it was quite possibly because of his sense that the disruption caused by Rooney's behaviour since his Boxing Day night out had contributed to a considerable extent to the loss of six points at a crucial point in the title race.
The Cup victory was hugely welcome, no doubt, but did it clear away all the other collateral damage? Ferguson would surely have been a little rash, and even complacent, to say that.
He was, though, candid enough about the severity of his disappointment over his team's second-half performance, which saw a 3-0 lead and a man advantage shrink almost to nothing against superbly rearranged opponents. It was hard to decide which aspect of City's game was most impressive after referee Chris Foy so grotesquely took away a competitive edge by giving a red card to Vincent Kompany after 12 minutes.
Roberto Mancini's halftime tinkering, which saw the disappearance of David Silva and Adam Johnson and the installation of a five-man backline, had the hallmark of an Italian maestro of defence.
It would have been merely a memorable act of containment but for the brilliance of Sergio Aguero's challenge to Rooney as man of the match.
Rooney got it for the most persuasive of reasons - a dynamic shaping of the game with the early breakthrough and the sharpest of reactions when his penalty shot was saved and he was still able to create a three-goal margin.
The truth is that Ferguson will not be dwelling too happily over much else in United's life-giving victory, and perhaps least of all the distinctly mixed results of the decision to call back Paul Scholes from retirement.
As iconic symbols go, Scholes grows a little larger each day - his autobiography passed 100,000 sales recently - but his return to the field was not overwhelmingly happy, especially when he surrendered the ball without serious pressure before the huge-hearted Aguero brought City back to within a goal.
By calling back Scholes, Ferguson announced to the soccer world - and his American owners - his concern about United's skeletal midfield as he tries to fashion his 13th title triumph.
It was the surest indicator of serious United action in the January transfer window. With Ryan Giggs struggling to inflict his old influence, and Scholes plainly a lion of the past rather than the present, United have rarely looked more in need of the engine-room refurbishment promised by the move for Wesley Sneijder last year.
Had they not been so stretched by the banishment of the brilliant defender Kompany and had available such as Yaya Toure, Mario Balotelli and Edin Dzeko, City must now believe they would have had the means to have recovered from Rooney's early impact.
Mancini was near speechless when asked about the Kompany decision - he plainly saw it as one of his more surreal experiences in soccer.
Rooney had plenty to say before Foy made his decision, which came after it was clear Kompany had won the ball and Nani was, without protest, turning in an attempt to regain possession.
This, too, is the soccer of today and having scored a brilliant goal, and kissed the badge so warmly, Rooney was plainly in no mood to let any advantage slip away.
Ferguson, perhaps not surprisingly, endorsed the dismissal, saying that if Kompany had connected with Nani, United would have had a fresh and serious injury problem.
But of course the connection was with the ball and what United had was an advantage that was in the end poorly exploited.
However, they do have Wayne Rooney interested again, even if it may be a little early to do more than pray it is something a little more permanent than a fleeting condition.
- Independent
