lol
Yes, I agree the action OP is describing is annoying and dickish — and the same goes for people who intentionally try to cause harm in other ways like throwing barrels at players or following cloaked rogues.
Since I am not a dick, I would never consider replicating these actions.
HOWEVER, as reasonable human beings we should not expect everyone to be kind and considerate to one another. DECA staff simply does not have the manpower to manage their inbox in a world where every single annoying behaviour is reported. It is not as simple even to punish every perpetrator of these actions either — it is also necessary to identify malicious intent, when there often isn’t. I trust that there isn’t a single player (virtuous or dick) who has never accidentally walked behind a rogue or accidentally aimed a barrel badly. Disconnecting or having doubts about your capability during a lava walk is not out of the realm of possibility either.
A simpler solution, benefiting both DECA and the players themselves, is for us to acknowledge and play around the existence of annoying behaviour, intentional or accidental. As a rogue, watch the minimap for yellow dots behind you. In a parasite chamber, pay attention to the players near barrels. Always have a backup plan in a Shatters and remind yourself that you have a nexus key (hopefully).
With this more aware and realistic mindset we can help decrease the amount of spam DECA has to deal with in their pursuit to ban cheaters who do actual harm to the game, and more importantly improve ourselves as players.