On one of my toons my search comment once she reached 50 was "Dual-boxing. This toon will NOT respond to tells or team invites."
I think I got one each and every time I had that toon logged in. Usually something along the lines of "r u a healr?"
Yeah, I'm dual-boxing a Rad/Psi defender at level 50 because it makes a good "healr". Of course I am.
Same character, earlier in her career, got asked several times by the same player "we need a healer, are you one?" This was over the course of several weeks. He must have asked me at least ten times. And every time my answer was the same: "Sorry, not an Empath. Feel free to invite me if you'd prefer to avoid taking damage, though, which would mean you won't need healing."
Not one invite from that guy.