You can restrict your game to friends only and even start the game single player only. I beat the game yesterday with my Level 26 barbarian and I think this game is really good. Not perfect by any means, but really really good. Hell, I got the game friday at 12 and 24 hours later I already had 13 hours of playtime on this. I think thats pretty good for a handheld game. My overall most played game is super mario 3d land with 21h since january lol.
bear with the evil german^^
Edit: Also, Kylie Dog, you seem to think that its the games fault that the Internet is full of douchebags. Furthermore, as far as I remember, you can't start a quest until everybody is at the same place (quest giver) and everybody gets the reward when someone completes it, so I don't understand your problem. There ARE failsaves in place to prevent somebody from getting left behind and if you play with strangers its normal that they do not wait for anybody unless they absolutely have to.
Ongoing bet with think-man: He wins if MH4 releases in any shape or form on PSV in 2013, I win if it doesn't.
