I'm always amazed at the dedication of the regular bin-cleaners. Some people even actually pay companies to come and clean them every time (although they always just seem to put a huge, logo-ed, tight-fitting bag in them, which keeps them clean anyway, so they're effectively being paid to come each week to change a great big bin bag).
The older couple who live opposite us always give their bins a thorough deep-clean after collection and then leave them upside down, lid open on the drive, to drain and dry off - which always looks like they've been very naughty and are being condignly punished.
Bearing in mind that the green one should only have contained clean mixed recycling and the brown one garden waste, which is just natural outside materials that stay outside - they don't see the need to keep scrubbing it clean whilst it's out there still growing, so it can't be that offensive.
Even with the general waste/landfill bin, all the contents should have been in tied-up black bags, so it can't get that bad - especially as it's always going to live outside anyway. I can understand that you might need to give them a periodical clean if bin juice escapes from the bags and accumulates and, of course, if food waste in the Summer attracts a swarm of disco rice - but every single fortnightly collection?!
They're always so desperate to take the bins back in as soon as the bin men have been. I couldn't care less, but I've started to make it into a game and try and beat them - see who can Win The Bins 
Everybody needs a hobby