[Dedas]

I fully agree with Johnarryn in what he is saying. You may ask why I agree? The answer is because I want to role play when playing this game (and others), and that means not involving my real persona. This is a freedom.
Yes, you can get a reputation as a "player" as not being trustworthy. And the most obvious cause of this would be that you do not keep any promises in any games you play. And as people aren't stupid they see a pattern. The solution is of course to not create this pattern. Try different roles in different games. Then people will understand that you are the role playing type and accept that in this game you are trustworthy and in the other you are not.

Cheers!