Jas, this is a tough question. Of course I have been paired with someone that was annoying. I rarely have a full foursome, so the odds of getting a walk on are pretty high. 9 out of 10 times though it's a great time. The one does make for a mess.
On the other hand, since I play so much, I end up being that single walk on guy. And I am sure that from time to time, some person in the group got peeved at me for some reason. That said, I never offer advice to the others. I always play from the proper tees, even if the group starts "from the tips" when they clearly shouldn't be there. I also am polite and complimentary to the other players, always defering to who's honor it is and staying out of one's line. Yeah, I know, proper decorum. And I know that has probably annoyed some groups.
In the end, I am out playing golf and participating in the thing I enjoy more than anything else in the world. I am so happy to be there and just don't let negative voodoo get in my head. I smile and think of the positives, and just chalk it up....