As I said, I never used that block button yet. (I haven’t played much online for I’m still a bit scared to do so… I’m more of a solo player.) I thought it meant you could prevent to encounter someone you didn’t like through the matchmaking system. If it’s only to block messages, I don’t see its use… it’s not like AoE2 is a Twitter erzats 11.
There should be a “no laming” lobby and/or a “galant foe” lobby for people like you who send the sheep back to the enemy TC 
I think I could enjoy playing against you, I like an honorable fight. 
