I'll be happy to answer the question.
First, I must observe that how one 'experiences' Poche will depend on how often one checks the forum. I check it multiple times a day. When I check CI for the first time each day, whether that's in the morning or at my lunch break, the first thing I find is that all the discussions that had happened recently are back on the third or fourth page, because Poche has started somewhere around half a dozen threads since I last logged on. Very rarely does anyone reply to them, they just take up space. To someone who does not check CI often, they will see Poche's threads but they won't realize that his threads are pushing valuable content off the front page. So this is a problem that will annoy people to varying degrees, depending on the frequency one checks the site.
Most of the threads he creates are absolutely useless. Strange yahoo news stories that have absolutely zero to do with traditional Catholicism. They are vague, fleeting and trivial. I don't mind the postings about the saints, but it is insulting to traditional Catholics to post according to the new calendar, which he invariably does.
Which brings me to the main gripe, which is that he is thoroughly Novus Ordo. He shows zero interest in traditional Catholicism, and often undermines it by defending the Novus Ordo and highlighting 'the good' in it-- in fact, he ONLY talks about the good. It's like being in a 12 step program.
Neither is he 'new' to the trad (and neo trad) fora. I remember when he first started on FE about two years ago. Exact same behavior. Then migrated to SD, from where he was banned. Why he is allowed here is beyond me, I think if he must be tolerated then at least give him his own thread where he can post all his threads, and I'm not kidding. But he has been doing the same thing for about two years now (it may be a little less, I am banned from FE so can't check his join date) and has changed nothing, despite many, many pleas from users to do so.
Not only does he continue to post gibberish news stories despite the fact that relatively speaking, NO ONE replies to them, he also continues to spread Novus Ordo propaganda, even in the face of frequent fraternal correction.
Having witnessed this for so long, I am left with assessing either bad will or mental illness to him. No normal thinking person would continue in behavior that annoys, bothers, frustrates and insults the majority of his 'neighbors' unless they were either mentally deficient, or malicious.
Finally, may I point out that 'padding' ones post count (posting at a high frequency with little to no substance for most of one's posts) is a tactic of internet shills? It gives the impression to lurkers or people who are just passing by that you are a 'standing member' in the community, and in some way or another represent the communities views-- that you are trustworthy. The frequent starting of garbage threads serves the same purpose as well, to obfuscate the general purpose of the forum and purport the daily discussion to be something that it isn't in the eyes of the lurker or the passer-by. I make no accusation, but his behavior speaks for itself.