Never ever ever drop in, unless......
You know your faster and more capable of out surfing the bloke on the inside! Jokes

In seriousness though, I don't mind if you drop in on my most of the time, as long as your NOT GOING STRAIGHT!!!!

if you can get on the shoulder and out of my way, it's all good.

Sup's great for sharing, but hitting each other hurts, a lot!
JB