Full-time: Scunthorpe United 0 MK Dons 3
Vitriol towards manager Alan Knill reached its strongest level yet as Scunthorpe United plunged to a fifth defeat in seven games – and their second in succession at an already sparsely-populated Glanford Park.
Boos rang out at the final whistle and there were numerous calls for the manager's head as the Iron boss' position grows increasingly untenable.
The Iron gifted MK Dons their opening goal and then did little to suggest they were ever capable of fighting their way back into a one-sided game.
Two expertly executed pieces of opportunism from midfielder Luke Chadwick were the difference between the two sides at half-time.
And in the second half, the Dons made their dominance count further when Paul Reid headed into his own net.
The visitors even had a late penalty saved by Sam Slocombe, to atone for his earlier howler, which robbed the brilliant Chadwick of a hat-trick.
Scunthorpe made four changes to the side which conceded three times in the first-half against Preston North End four days earlier – including pairing together David Mirfin and Reid together at the back for the first time this season.
Michael Collins made his first start in more than a year and Josh Walker came in for Robbie Gibbons as the Iron switched to a three-man midfield, while Connor Jennings started up front with Leon Clarke absent through illness.
The change to a 4-3-3 formation helped the hosts make a bright start on the coldest day of the season so far.
Mark Duffy was exceptional, be it on the right, left, or through the middle, with United keen to get him on the ball at every opportunity.
Duffy was desperately unlucky not to fire his side in front in the 14th minute as he built on David Prutton's persistence by drawing a challenge from a Dons defender and driving the ball goalwards, only to see it pushed over by visiting keeper David Martin.
The Dons found their hosts much more accommodating.
A cross from the left should have offered little threat, but it caught out Slocombe and when the Iron stopper could only palm it into play at the back post, Chadwick finished, first time, despite being at a tight angle.
More slick passing play opened the door again for the former Manchester United wide man on the edge of the box as the game reached the half-hour mark.
This time Chadwick didn't need to be presented with an easy opening and he instinctively lifted a shot right into the top corner.
The Doncaster Road End made their feelings clear with chants of 'Knill out' in the immediate aftermath of the second goal, before then ironically cheering Slocombe when he held a simple effort from Daniel Powell.
Although they recovered suitably to enjoy some decent spells of possession for the remainder of the half, in line with the rest of their season, the Iron failed to threaten the visiting goal.
Aside from two Josh Walker efforts from range, the first a free-kick and the second a left-footed strike which Martin pushed away, the second half followed a similar vein.
The comeback United had come close to completing in midweek never looked like materialising.
The Dons wrapped up victory – even though it had never really looked in doubt – in the 60th minute as more slack defensive play allowed a cross to the back post to be knocked back into the middle and Reid could only divert a header past his own goalkeeper under pressure from former Manchester United and England striker Alan Smith.
The question then was how many the visitors would score and they squandered several good openings.
Slocombe's poorly-struck clearance from a back pass fell straight at the feet of midfielder Darren Potter 35 yards out, but his shot at a gaping goal lacked accuracy and the necessary power to add to the home side's misery.
The Iron keeper though did much better eight minutes from time when he denied Chadwick what would have been a memorable hat-trick from the penalty spot.
Chadwick put the spot kick, awarded after Mirfin had upended Angelo Balanta as he raced into the box, low to Slocombe's left and he brilliantly pushed it away.
It was a rare moment for the home crowd to cheer, superceded only by the audible sarcasm when the tannoy announcer read out the names of the sponsors' man of the match at the end of the game.
The chants towards the Iron's manager carried much more sincerity
SCUNTHORPE: Slocombe, Ribeiro, Mirfin, Reid, Newey, Prutton (Grella 63), Walker, Collins, Jennings (Ryan 71), Hawley, Duffy. Subs: Severn, Kennedy, Gibbons, Canavan, Keegan.
MK DONS: Martin, Otsemobor, Williams, Kay, Lewington, Gleeson, Potter, Powell (Chicksen 38), Chadwick, Balanta, Smith (Lowe 74). Subs: McLoughlin, Doumbe, MacDonald, Alli, O'Shea.
ATTENDANCE: 2,737 (164 away).