I pretty much never taunt. In fact in GW2's taunt challenges/quests I always did them against AI or if my friend was on, we'd taunt each other to get them done. Most of the messages are amusing (the cantaloupe one, beef wellington, etc.), but yeah adding the poo emote didn't help anything.
I actually haven't seen that many taunts in BfN but I've barely touched PvP since the 8v8 change after testing it out for a few days so if it's gotten bad, I can't say from my own experience. Ops have been pretty friendly overall, usually stuff like 'loving' for getting heals or just emoting between waves, cheering for elite bosses, etc.
Overwatch had voice chat and that game was really toxic, so much so that it may now be worse than World of Tanks was and that game was awful for that. Love getting death threats from the first guy destroyed on my team when I can't win as the last tank on the team against 3 enemies of equal and greater tiers.