I suppose it could be called invalidation. The responses from people who negate you this way is invalidating.
But these people you talk to also strike me as "crazy making".... another term for that is gaslighting.(making you doubt your own perceptions and observations/reality).
http://en.wikipedia.org/wiki/Gaslighting
In any event it is THEM and not you. Just keep that perspective.
At least the subjects so far are rather small and benign.
I'd just smile and say "Hello" or some such whenever these troublesome people need to be greeted.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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