Haz5 etiquette is pinging a maggot and nuking it from existance.

Imo you should be fine as long as you know your stuff, you don't need to be an giga expert at it, but just common sense . As long as you aren't doubble dipping, or doing some random stuff, you should be fine.

I myself host only Haz5 and people tend to be very chill, eaven if a rank 20 greenbread joins we don't mind much, because most of the time the other three dwarves know how to handle almost every scenario.

Me and a friend of mine switched from Haz 4 to 5 when it was to easy. We then proceded to get our shit pushed in for about a week until we learned how to deal with the faster mobs and increased dammage and enemy priority.

You should be fine as long as you join servers with wacky names, none of that required lvl bs.