I got some abuse when I started but not had any for a long time now (lvl 48 and leveling very slowly), people have told me they are reporting me but have been quite polite about it . I have 4 macros set up to reply to the most basic questions. It may also help that I have a mixed group of gnomes and dwarves.

Set up some macros to reply to the basics. Try and be as polite as possible. If people continue being abusive you could macro

/assist
/tell target reported reported for abuse
/ignore target

on all five characters (not tested but you should be able to get something similar to work)

I am on EU Turalyon Alliance and there is at least one other multiboxer on the server.