If you are concerned about insider trading, that only refers to buying or selling on information not publicly available. There's nothing wrong with knowing or talking about insider info.
There might be an etiquette issue--if word got out that a big buyer was loading, others would jump in, driving up the price. Cool for us, not so cool for the big buyer who now has to pay more for his shares.
Buyers tend to want to do it quietly. The ones who make a big deal about buying are usually selling, and the "buying" is all talk to try and prop up the price while they sell (such are the games you run into here).
Winning is like shaving - you do it every day or you wind up looking like a bum.
Jack Kemp