They were already doing so, and this wouldn't excuse anything Russians have been doing even if Ukraine had bombed the fuck out of the place.
It's definitely a false flag (in my opinion, not actual confirmation by anyone as far as I'm aware), but not a very good one.
Yeah, they should toss it in a landfill like everyone else! Fucking posers, trying to do literally anything with stuff that isn't easily recycled or reused...