1) Someone who comes on asking for advice on buying a decent grill on a budget. They get lots of good suggestions, from a variety of knowledgeable posters, all which meet their budget. They then later post that they went to B&Q or Homebase and bought a piece of crap that you know isn’t going to make it through the summer. Why did they post asking for advice in the first time? I’m not sure.
2) Someone who posts that they are planning to do something difficult and creative, such as design and build their own smoker from scratch, or build a custom control box. They big up what their plans are, before later posting a question asking something absolutely fundemental. It is then that you realise that *they* are not designing anything, they expect the forum to do it for them. It is typical of this kind of poster that any attempt to answer their initial question will either (a) lead to further fundamental questions (b) see them then argue that your advice is wrong, and you don’t know what you are talking about, and that *their* method (which they only have a half-arsed understanding of, from a previous answer) is the best and only way.