Then I would suggest that you never fly near buildings where you know your quad is going to be lost to view, or are you saying that you 'accidently' sometimes fly behing building and lose LOS?
What? If I lose VLOS it is temporary due to an obstruction etc. and VLOS is regained ASAP or the flight plan is aborted and RTH takes place. I suggest you take a moment to read more about who you're trying to call out.
We operate with an extreme abundance of caution (VO's and sometimes multiple VO's when needed) and we operate in some very harsh (busy/technical) environments. We fly from active airports, with manned aircraft (coordinated with an AirBoss) and many other highly technical locations. I can assure you our Flight Operations are much more safety conscious than the vast majority of flights you read about or probably perform.
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