New commers, right off the bat stating they have something very rare or valuble, at first! The con here is that if they truly knew that would they be new poster or new collector? Of course not all by a long shot with this wording are guilty. But the giveaway here is "how in fact, do they already know for sure" I would not have! Are they just bragging or do they indeed have "another agenda"? Changing avitars. It would never have occurred to me to change my avitar on a post by post basics, week to week or month to month. Could the con here be to confuse and distort or keep us a little off base? Posting then fading away. Posting like crazy for a short time thousands of post, arguing, debating and then silent, gone for awhile or for good. The con here is hidden agenda for a single purpose posting. Take statequarterguy, where did he go? Again, many that may do this are not guilty but many I fear are! Inflamed remarks almost from the first. This con is common and fairly well noticed right off and thier motive is not at all to learn about coins. Are they mad at the world or things we know nothing about? How on earth do they not see that we see them and if so what will make them happy, surely not us because we don't know what's bothering them in the first place now do we. Posting only in one single area. This con is not representitive of a normal cointalker. We comment and surf in many different areas of CoinTalk because we are interested in a vaired amount of subjects. User ID similar to past users or locations. Many times I've noticed this and you'all have to. The con here is ideas on subjects a little too close to past posts or that they remind you of other who suddenly left or have been banned. That's all I'm going to list for now but I would like to hear other's hints about posters with no good intensions or what you have seen as red flags of cons.