I remember about 4 years ago Foscam cameras had undocumented back doors that could not be disabled for a while, but vigilant users discovered their cameras phoning home despite all the user-selectable remote options having been switched off. This went viral over their own forums. They pretty rapidly brought out new firmware which closed it off, but by then the reputational horse had bolted. Foscam no longer have a realistic presence (apart from the vestige on Amazon and Ebay) and their "professional" brand - Amcrest - which used to send me regular teaser email offers, seem to have died since April.
Do we know if the Hikvision back door is user-switch-off-able or if a firmware update will be required to close it off fully? Port 80/81 back doors are the worst; other port back doors can be nipped in the bud by appropriate router firewalling. If the former, whilst from a PR perspective they've been prats, I don't see it as a particular problem. If the latter... one can not be sure of what's to come depending on the reasons behind it.
I don't think it will deter me from getting my new place equipped with their 8MP turrets - nothing will be of interest to any of the pundits, and I seriously doubt any opportune burglar will be capable...
I guess since I'm imminently to purchase cameras, I should hold fire for just a little while lest a blanket software update be forced through - I'd want that to happen their (or your!) side of the fence I think.