A number of smoke bombs were thrown onto the field marring Forfar's abandoned Scottish Cup replay against Linlithgow Rose on Tuesday night.
"I'm not entirely certain Scottish football can do anything to eradicate it," Donald told BBC Scotland.
"These tiny missiles that are coming in are the size of a cigarette lighter."
The fourth round replay was cut short due to floodlight failure at Station Park, with a "distraught" Donald stating he had not anticipated any trouble or pyrotechnics from supporters.
"Had this been a higher profile game, we would probably have put measures in place," he said. "But because we'd already played once and it went off absolutely seamlessly, you do your risk assessment and we thought we had the adequate amount of cover.
"We possibly could have handled it better and maybe we should have been more prepared, but I think when you sit down, do your analysis of the facts before the game, this is probably as low-risk a game as you could get.
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The 42 SPFL member clubs met on Tuesday, with facial recognition technology mentioned as one potential method of identifying fans engaging in antisocial behaviour.
"I'm open to suggestions from people - how would you control it?" added Donald. "If you've got 500-600 people in a contained environment and they're hell-bent on setting a flare off, you would need to have a steward for every three or four spectators to stop that, and that's never going to happen.
"It's really regrettable and it's something that is happening more and more often. It's a wider problem that's becoming far too prevalent."
Linlithgow Rose manager David McGlynn said the club would try to track down those responsible for throwing the smoke bombs, while club president Les Donaldson attempted to challenge the perpetrators at Station Park.
"It's just shocking to think that a club who has tried so hard to go forward, to make facilities so good for every person who comes along to eventually be brought down by a bunch of hooligans who have no interest whatsoever in watching football, all they were there for was causing trouble," Donaldson told BBC Radio Scotland on Wednesday.
"All I wanted to do was try to show solidarity with the stewards and the police and try to get these people to realise how they were letting a club down that has never been in any trouble before.
"To be faced with this bunch of morons last night - they are not true Linlithgow supporters - we are just at a loss what to do."

Heather Farmer told the jury that in the five years she had been a registered childminder, Liam was the only child she had concerns about.
Rachel Fee, 31, and her partner Nyomi Fee, 28, deny murdering Liam in March 2014 at a house in Glenrothes, Fife and ill-treating two other boys.
Ms Farmer said she had looked after Liam since the summer of 2012.
The jury heard Ms Farmer kept a diary during the time she looked after him, noting he had bruises on a number of occasions.
She said by Christmas 2012 she had begun to have doubts and contacted the Scottish Childminding Association for advice because she thought " somebody was hurting Liam."
Rachel Fee and Nyomi Fee, who are originally from Ryton, Tyne and Wear, are accused of murdering Liam in March 2014 and attempting to defeat the ends of justice by blaming the killing on a young boy.
The couple are also charged with a catalogue of allegations that they neglected Liam and abused two other children, one of whom they blame for killing Liam, in their care over a two-year period.
They deny all the charges against them.
The trial at the High Court in Livingston continues.

All of this weekend's matches in the Champions Cup and Challenge Cup due to have been played in France have been called off.
Bath Rugby tweeted: "Our thoughts are with all those affected by the tragic events in Paris, and safe travels home to everyone in France."
Toulon have won three successive European titles.
Forfar Athletic chairman Alastair Donald has conceded he has no solution to the recent spate in flares and smoke bombs being thrown by supporters.
[NEXT_CONCEPT]
A childminder has been telling the Liam Fee murder trial that she had concerns about the toddler.
[NEXT_CONCEPT]
Bath's European Champions Cup match in Toulon on Sunday has been postponed following the deadly attacks in Paris.