I think you're working off a wrong initial assumption there. Players aren't all as stupid as some on this forum would claim - they know when they've been disadvantaged in the form of a foul and they know that quick free kicks exist. If you disallow a QFK without a good reason, all you're going to do is change which team is annoyed with you. And what's more, you'll change it from the team that committed the foul and have no real grounds for complaint, to the team that was already disadvantaged and are 100% correct is saying you've cheated them out of a good goalscoring chance.Fine, that situation went well for you. Next time maybe it won't and maybe you'll end up with a couple of dissent cautions and a goal instead of a ceremonial free-kick. Sometimes you have to protect yourself, especially at grass roots when players are not going to hold back if they think you've wronged them. It's just like allowing a goal from a pass back to the keeper after an injury, you should allow the goal, there's nothing you can do in law, but if you don't want a riot, you need to improvise.