Originally posted by blankitosonic:

Its not only events , when kill bosses , in night time will spawn harder mobs ( graydwarfs > skelletons > fulings )
Best way without devcommands its to start in a new seed but you can keep playing with your old character and pass equipment to new seed for your friend

Pretty much this ^

Just get the elder trophies and metal in a new world, and you can circumvent events by not killing any bosses.
The worst event you'll have then is boars attacking. lol