perhaps you should avoid making this assumption that a search was not being made in the first place. a different keyword in the search engine may have make a difference.
event holder may set up a perimeter within which the event was conducted. i'm first of all, not sure if this open ground usually next to a building are actually public grounds or belong to the management of the owner of that building, say for example the forum in front of taka belongs to taka? i assume if the organiser needs to seek permission and arrangement with the private authorities would mean that these open grounds are actually not really public grounds, but may be private properties, although the organiser is not necessarily owner of that private property, but rather a temporary renter.
secondly, supposedly one is not within the perimeter but is just outside of it. he probably have a definite right to shoot, but does the security guard has an equal right of standing within the perimeter and physically blocking the line of sight?
i gather from your reply your answer is a no to the question. but i hope you understand the exact reason why such question is asked is becos the situations varies from one situation to another, and such topics are frequently asked in different context, and people are trying to find a balance between protecting their rights but not wanting to behave obnoxious to the public mind (some non photographers sees us as being proud, pushy and too adamant on our rights, and being insensitive and intrusive). many may not stand up for it becos it is not firmly clarified on how best to get around things, and that is why these threads continue to be around.
anyway, thanks for your reply. just wanted to further clarify the purpose of asking in this context.