Clash Royale maker encourages trollish behavior because it wants players to experience "strong emotions"

Supercell comments:

Adding an option to mute, or delete, emotes is a highly requested change. However, we have no plans to implement this feature, and we want to explain why.

One of our core design principles is: Cards that evoke strong emotions are the best thing for Clash Royale....

The same principle - evoking strong emotions - is at the heart of why we're not planning to implement a mute option. Emotes are loved by some and hated by others - even within the Clash Royale team! We believe these strong emotions are integral to the core of the game.