I've always helped others out - especially in the lower zones or burning crusade zones because they're nearly emtpy.
I don't help ppl through instances (don't wanna drop one toon because the amount of exp everyone got starts do differ
and the RAF bonus stops for one char). But helping out killing a single elite mob is for me "the most natural thing in the world"
(taken from babelfish - don't kick my butt if it doesn't make sense).

Usually those mobs are a one shot for my crew and I've never had a bad comment after I've explained that I play all the chars at once.
Most of them ask how it works and even a guild invited me to raid with them when I'm 80 so I got mostly positive reactions. The more
people you know, the more people know that you aren't a bot, the more defend you against smallbrainers that don't know what we're
doing and don't want to know because crying out "botter, reported!" is easier.

So showing others that you're helpful and that you're a human, not a bot makes much things easier.