I have been thinking it must be birds pulling them out the bin, because it just doesn't make sense as you say.
We have a metric tonne of seagulls here who ransack the place night and day.
Nah, some just bag them then drop them. Seen it for years. I can only assume they run on the assumption that it's easy for street cleaners to pick up, but that's being incredibly generous to them. It's ultimately the height of laziness and selfishness, they just don't want to be dealing with it too long, that warm s*** heat, but also don't want to be the pure scumbags that don't even bag it. They think they're meeting you half way.
c***s used to hang them on gates and stuff, definitely not birds doing this. It's been a problem since the bags first appeared. Parliament has indeed discussed banning the bags as a result of this behaviour, but haven't yet and it got lost as a point of debate in amongst Brexit etc. Old people and neds tend to be the worst I see. Neds take joy in doing the oddest things, hanging them from twigs etc, oldies just can't be arsed, or possibly find it difficult to deal with.
