I was thinking about playing on Red, just have a couple of questions.
 

1) Are there classes that are completely gimp that I should avoid?

2) Can you attack group mates?

3) Can you trust group mates?

4) When you kill someone, you can loot all their stuff? Or just money?

5) Can 60s kill lowbies?

6) Do you lose exp if you get killed by a player?

1. Prob play Druid, necro or chanter first. Then whatever unless you have friends.
2. Yes and you should at the end of the night when someone says they are leaving soon. If they have low health go for it.
3. I am guessing yes since there is like no pvp until 50.
4. Only money.
5. 4 level max pvp. 60 can only attack 56.
6. No just gold, which is lame. Should be exp. server has crazy custom box exp modifiers to help players get to 50 fast. Since there is basically no lowbie pop. Not sure why you can’t just start at 50 on red.

People are forever leveling more alts, which doesn't seem such a daunting task with exp bonuses being so high. So there are SOME people at the lower levels, though Tass is right that the vast majority of toons are 50+.

Also, being pk'd by your groupmates with nothing (arguments, ninja looting, etc) leading up to it is vanishingly rare. I've been playing since 2015 and I've had it happen just once.

Gimpest pvp classes are Mage, Ranger (unless you get a Windstriker,) Paladin (easy to survive but almost impossible to kill anyone) and of course Cleric for solo pvp, though they're immensely valuable in group pvp. If you want to solo pvp as you're leveling your first character, go druid, hands down.

thanks for letting me know. I didn't know that since I am busy REBIRTHING KID.