There Are Other Issues Here...
I have to agree with both sides on this thread. Yes, OC'ing where you are likely to draw the attention of law enforcement is a tad masochistic, with a dash of nutty for good measure. On the other hand, allowing a right to be determined by the possibility of police harassment renders that right essentially moot. Hell, if avoidance was the only metric, none of us would carry: all of us here should expect that, at some point, we will be reported to the police by some fearful citizen who caught sight of the weapon, i.e., "man with a gun" call.
However, there is are more important issues at play here, all of which ought to encourage gun-owners to carry openly, at least on occasion. That is, Open-Carry serves several important functions.
First, in cases such as those described in Norfolk and Alexandria, it serves notice to local law enforcement that law-abiding behavior cannot be punished based on the officer's whim, prejudice, or ego. It thus serves to educate police about the limits of their authority, and it encourages professionalism and impartiality on the part of the local force.
Second, it serves notice to local political authorities that affected individuals will actively resist encroachment upon fundamental liberties, a critical element in the relationship between citizen and government. Put differently, a citizen who accepts blindly the dictates of an authority figure can hardly be said to be a free citizen of a democratic society. Where authority is absolute and unquestioned, there lies the seeds of tyranny: the relationship between citizen and government becomes one where parent dictates to child.
Finally, Open Carry serves to "normalize" the bearing of arms within the larger community. Occasional Open Carry by all gun-owners serves notice to pro-gun, anti-gun, and neutral parties within society that gun ownership is a right, and that bearing of arms by law-abiding citizens is occurring all around. Normalization benefits all of us who carry, inasmuch as all types of carry (concealed or open) gradually become part of the background social "noise". By noting that individuals can carry guns without going berserk, Open Carry also teaches citizen-peers a very important lesson: bearing of arms by the law-abiding is harmless, whereas bearing of arms by criminals is harmful. The intention of the individual, not the gun, is the key factor.
FWIW, once I return to the VA, I intend to Open-Carry occasionally. I think the ultimate benefits outweigh heavily the attendant risks.