Yep. A few months ago I helped a group that was trying to three-man it without any success, I pitched in and helped because the guy who was trying to hold the front left sync plate just didn't have the firepower to deal with the Praetorians that come at you from both directions. So I stayed until they got the spire to from. They actually wanted me to join their raid, but I didn't have the time to do a raid. Sent them a reply so that they knew that, and wished them a good raid. I'll also help noobs in the Rocketyard. You'll often get level 4s and 5s that go exploring back there, and are just overmatched by the level 8 and 9 monsters. So I'll often give revives, and fire support while they're in my area.