Scrapping and Blanket Parties still happen on certain courses. Not that I've ever been involved or even seen anything like that...
Here's a hypothetical scenario, that never actually happened, and any similarities to actual events are purely coincidental:
You've got Pte Bloggins, 4 weeks into his BIQ in Meaford. Then You've got Pte. Smith, just recoursed into Pte Bloggin's platoon. For whatever reason, Bloggins and Smith just don't get along. Smith thinks Bloggins is a cocky little SOB and Bloggins thinks Smith is an asshole who just likes to throw his weight around. One day, after an exchange of words Bloggins and Smith decide that they'd better take it outside. After a few minutes roughing each other up, Pte Jones comes outside for a smoke, sees the commotion and calls over some other troops to break up the fight. The result? Smith and Bloggins don't talk to each other outside of work, but still have a certain level of respect for each other for having the stones to get out and fight. There's no more smart ass comments between them, talking behind each other's back, or anything else. The entire platoon knows where both Smith and Bloggins stand with each other, so we can reasonably say that everything is out in the open.
Fast forward 3 weeks. Its the final BIQ field ex: Pro Patria 1 and 2. Smith and Bloggins end up building a snow defence together. Its 0330 hours, the boys haven't slept for a few days, and they're not looking forward to the next day's advance to contact. They are now put in a position where one man shovels snow while the other rests, and each trusts the other to warn him when the Platoon Warrant is coming so that they can both look busy. If either of them gets caught slacking, the WO will start launching paraflares, a stand too will be called, and the boys getting their precious few minutes rack will be forced back to the fighting positions. The stakes are high, but you do what you gotta do, right?
By the time grad day rolls around, Smith and Bloggins might still not like each other, but at least the TRUST each other and RESPECT each other as SOLDIERS. They might never talk again, but they know that if shit happens, they'll be there for each other.
And thats all that matters. If Smith and Bloggins didn't scrap it out early on, the beef between them would fester and divide the platoon. If the course staff ever caught on, the entire platoon would pay the price in one form of "Group Therapy" or another. Scrapping man - to - man is often the quickest, quietest, and most effective means of settling dispute.