INVASION
1: an occasion when an army or country uses force and/or armaments in a planned, coordinated and organized form to enter and take control of another country
,,, This is the US Constitutional sense of the word.
2: an occasion when a large number of people or things come, in a relatively organized fashion, to a place in a manner that is annoying and unwanted to most of the indigenous population
... This is the way the majority of New Hampshirites use the word when discussing the Free Keene movement. Pretty much the same for Woodstock 1969 (though shorter-lived than Free Keene).
3. an action or process that affects your own life in an unpleasant and unwanted way
... This is the manner in which you're using the word.
I may be wrong of the source of the following ( I suspect it was P J O'Rourke) and I don't recall the actual phrasing, but the gist of it was: "Before supporting government action on anything, think first how whatever you're giving the government will be used by political factions you don't support when they eventually come to power." SO, when redefining "invasion" (a threat from outside), recall that the Constitution also mentions "rebellion" (a threat from within) in that same clause - and the same latitude you're taking with "invasion" will also be applied, quite liberally, to "rebellion" by the next administration when they come to power.