The ones which Russia is now deploying in Ukraine don't appear to be anchored in the ground, just laid on top of it - you can just push them away with a bulldozer or a group of people.
I'm not sure what the soldiers in the tank expected. Maybe they missed the "don't drive over obvious mines" day in tank school.
Drivers in cars in best conditions fail to notice things, so it is not all that surprising that Russian army soldier would not notice things.
Typically, you use obstacles in engagement area development as part of a defense. An obstacle that's not observed isn't valuable because it's easy to circumvent. You can probably use a bulldozer (guessing, I was light infantry, not a tanker) to breach the dragon's teeth relatively quickly so the obstacle doesn't have the intended effect. However, it's much harder to breach the dragon's teeth if someone is shooting at you. Now you need an armored bulldozer, or enough suppressing fire to cover the breach.
https://en.wikipedia.org/wiki/Python_Minefield_Breaching_Sys...
https://twitter.com/UAWeapons/status/1590087764070268928
Video description: Drone video of a Russian armored column advancing when a mine-clearing vehicle gets hit, suffers earth shattering kaboom when the mine-clearing charge goes up.
However, on top of the shame for what Russians are doing in Ukraine, the shame for how they are doing it is almost as disgracing.
> One of the best methods of overcoming these obstacles was by bulldozing soil over them.
I also thought about it before that point. But
> However, in many situations this was much easier said than done while under fire.
I didn't consider this. I'm only a keyboard tactician.
Gotta show the grandpa the pretty picture. Grandpa loves war movies.
So the dragon's teeth are really just for show.
There's something very, very seriously wrong with the Russian military. Although that's really not a bad thing as far as Ukraine and the West are concerned.
I am pretty sure they've had them for a long time, not least because they did multiple river crossings, many successful. Their army is quite capable, and was already quite capable prior to the post-February wave of foreign support. For example in the air defense department, as far as Europe goes they were only second to Russia (though the missiles are starting to run out).
Ukraine was deeply integrated into the USSR and even Russian military industrial complex - shipbuilding (after Moskva sank the remaining best ships in the Black Sea Fleet are made in Ukraine, Mykolaiv I think), engines (both turbojet/turbofan and rocket), whole aircraft manufacturing (Antonov), assembly of armored vehicles ... The lead designer of R-7, the first serious space rocket and the reason why Russians think they won the space race, was a Ukrainian.