So once again twitter has sparked up another glorious Meego Vs. WP Vs. Symbian debate,this time as is usual it all came back to the fact that most of the tech aware online community are geeks; and geeks love to tinker with stuff (it's in our blood), how bad would it be to make a developers device that has an unlocked bootloader for some geeks to mess around with? If the fear is sideloading apps/pirating then they could simply add a premium to the initial cost of the device (say another 50-100 $) to cover any possible piracy fears and pay those over to devs, or reduce the app hub membership to be fair to all (of course then choosing to buy the phone with this App premium would only be for people who plan on messing around and wouldn't be forced onto all WP adopters).
Side Note: I used to live off side-loading apps on my N8 (still do) and I was always looking forward to trying the next tweak or fix; but for some weird reason WP/Lumias have tamed that beast inside me; I no longer feel the need to try tweaks or mods or even to sideload any apps. I'm not sure this is a good thing but at least it gives me alot less to worry about (Possibly the main reason is that WP simply works meaning I don't have to go behind anybodies back to improve it).
When I look back at it I think my love/desire to sideload/tweak the device rose out of necessity rather than true desire, which is the only reasonable explanation why that urge has faded; simply because WP delivers directly so you don't have to dirty your hands hacking and sideloading.