nuisance of those bikesWell, actually, the nuissance of the people not knowing how/where to put the bike away properly and/or being too lazy to do so or just being too selfish and not caring about others at all. Just like there's always this couple of car drivers parking where they shouldn't etc. But with these bikes it's just way easier to do. Just like it's also way easier for you or any one else to pick up the bike and put it away 2m further if that's less annoying, which is what I'd do if it would be in my way.
In the end I think the only solution is a mentality shift and more bikes, contradictory as that may sound. When enough people realize their behaviour is super annoying they might actually do something about it. In cities with a thousand times more bikes than in Paris there aren't too much problems like this because most are in the same boat.
there is such little room in the Parisian streets
Hmm, I'm not sure what part of the city exactly you're talking about and yes there aren't too many official bike parkings but in general I'd say there's plenty of room to tuck away a couple of bikes. Perhaps not always right in front of the place one wants to be, but still..