It's one thing for a bunch of noobs who don't know any better to refresh away things like Crow's Nest/The Ship kits & Sentinel Towers.
I've had for example, one dude who I've hit every day over the past nearly 2 weeks after he refreshed away a Lv1 GV I'd been sitting on & waiting to poach for roughly an hour...
You're still not entitled to win it, no prize is guaranteed
Finally, he'd had enough and sent me a message asking why I was picking on him. I explained why I was targeting him. He'd been after Tactician Towers because he occasionally gets plundered.
I explained to him why they're useless crap, and how to better protect himself from wolves like me, and why instead he should focus on something like the Ship kits & ST's + upgrade. Now he's not only a better player, but he's also learning how to properly look at event buildings by their production per tile vs. just the raw stats.
Why not just message him and explain all that? Why go straight to the plunder, hmmm?
Another 'hoodie I've been hitting on the other hand, obviously is just a casual player who doesn't care about getting plundered, nor improving their city. (seriously, still 2 spearchumpies for defense in HMA - and after 8 strait days of being plundered?!)
I'll still happily nick their stuff, and they still happily keep pursuing crap like SoK's, Outpost kits & WW's.
Ok, fair game here, he's a natural target. Don't agree that WW are crap, though (at my level anyway)
There are however some players who's only goal is to literally troll their 'hoodies by purposefully denying them top prizes.
These types deserve every last bit of hate, just like the player who uses their 1.9+ Arc to screw over smaller players trying to level their buildings, or the player who sabotages opposing guilds, etc...
Dirty play is dirty play. It may not technically break any game rules, but then, it's also only a 15 yard penalty for attempted murder of a QB when you lay him out when he slides...
Agree with you on the trolling part but, like I've said before, you being annoyed at a neighbour refreshing away your intended prize is no different from them being annoyed at you plundering them. Just things that can happen in-game.