I agree it's poor form to post actual offers on league message board and I feel like everyone that is saying otherwise is not being objective.
It feels like some herd mentally ganging up on this Hoffman dude because of 1) his rep on the boards 2) he posted the offer and context (it was a truly ####ty offer and new league mate so appears he was trying to take advantage of a newb) 3) he tried to then justify the trade as being legit.
I'll address 2) because 1) and 3) speak for themselves. WE ALL have made truly crap offers before. And WE ALL have tested the waters with Newbs to see if they value players/picks different than consensus/the herd. Anyone saying they haven't tried to take advantage of a Newb (i.e. A market inefficiency) is being disingenuous to everyone here and to themselves. Perhaps the long timers here are all above this (highly doubt it) but the average dynasty player is not.
On the completed trade thread when someone posts a trade they've made clearly favoring them (even truly awful) it's usually high fives and nice job with the highway robbery spattered in with a very rare "league killer" type comment. The reality is someone sending ####ty offers doesn't kill leagues. People doing ####ty things kills leagues. Posting offers on league boards, Leaguemates not submitting complete lineups, starting injured players on a bye, collusive behavior. These things coupled with Commish inaction is what creates derision and kills leagues.
Someone constantly peppering other owners with crap offers while annoying does not. That person may be blackballed and create a scenario where they no longer are able to effectively operate. If that happens that's on them. They may very rarely get a steal from a Newb. If they do so, good for them. But in general those types accept as many terrible deals as they are able to pull over on others. They don't tend to make out in the long run.
Was this guy butt hurt because his trash offer was put out in the open? Yes, but it still doesn't make it right or okay to do to begin with.