I guess we'll have to disagree on this, Angelbrat. I have read many posts lamenting the denial of a temporary visa because of 'insufficient ties to the mother country', where the applicant had bank assets, a house, family, and even a job in the mother country. What more could the VO want?
Other applicants get temporary visas with much weaker ties to the mother country.
How to explain the inconsistency? Until the VOs provide reasons for their conclusions, we cannot know whether their decisions are proper or just arbitrary. How do these apparently solid people (including my wife, recently denied a travel visa) manage to "throw suspicion on themselves" as you allege? They present simple documentation with their application, and would have to be very foolish to say anything that woudl cause a VO to be suspicious.
Do you have inside information about the factors that VOs consider? I'd love to hear it, because I surely don't.