So I'm on, like, my 15th alt, a druid who just banged 80 and is now in vashj (because where the heck else does a druid go at 80?), and out of the blue, I get a group invite from an 85 druid.
Now, I'm not great, or even terribly good at wow in general, but I can rip through quests fairly quickly with no help, but I figure not everyone can, and I don't mind helping, so I accept the group request. I ask the druid how many more items he needs for the quest we're both on, after about 15 seconds he answer back "2", so I smoke the 2 mobs he needs, then we both hand in the quest, and get the next one.
I'm generally pretty talkative, so I'm chattering away & he's not saying hardly anything at all, and is having some trouble following me as I zip about (go go glyphed aquatic form with sea legs), so I slow way down. And despite the fact that he's doing like 1/10th my dps, I don't care, I'm happy to help.
We go a long a bit, & suddenly the toon stops and pauses a few moments then says "you were playing with my 9 year old son, thank you, do you need any help?"
Now, I reflect back on how people get impatient and just rudely would have dropped group, or said stupid things like "god, you're feral, why did you just starfire, you scrub" or some other stupid thing - and I feel pretty good about the fact that I'm NOT a douche (as long as I'm not pvp'ing ;-)
Anyways, stay safe.