Bad Aliens: Bad aliens are usually dealt with through violence. There are many movies that show how wars can begin because of alien invasions. As seen in Alien, the only way to deal with it was to kill it.. They bear ill will towards certain, if not all, other species they come into contact with. Usually their thought process goes along the lines of “kill kill kill”. There doesn’t even need to be reason for their mindless slaughter. However, more intelligent “bad aliens” might be able to use their wit for other options as well. An example of this could be the complete enslavement of another species. The way to deal with this kind of threat unanimously goes toward violence; an act of survival of the fittest. In order for us to preserve our species we must eradicate another, entirely removing the the threat that they pose. luckily , for us, most aliens seem to be weak to the weapons that they produce today since they are, for the most part, organic. Good Aliens: These aliens are usually friendlier than most. In movies like Home and ET friendships are made. They are originally misunderstood, but then become accepted by the person closest to them. People still fear these aliens, but there is far less conflict needed with them. Good aliens are those that pose little to no threat toward our species. They may or may not be intelligent beings, but the general consensus is that they usually mean to have peaceful relations with us. Dealing with Good Aliens is a painless process. Passive aliens don’t need much attention placed on them since they cause no harm to us or our resources and the intelligent beings may even be willing to form alliances with us. Whether they be passive or friendly, Good Aliens are the easiest type of aliens to work with.
Dumb Aliens: Some of the aliens in movies like Men in Black aren't as smart as aliens in other movies. They are given the work that that more advanced aliens don't want to do, and are occasionally looked down on. These aliens are also easier for humans to kill. They don't put up as much of a fight, and aren't smart enough to come up with fighting plans. The dumb aliens aren't taken as seriously by anyone, Some of the aliens in Men in Black are killed in seconds, and don't cause any fear in the people killing them. These aliens are the easiest to kill. It doesn't take a lot of thought or planning to figure out how to fight back against it.
Smart Aliens: There are smarter alien species, that are more of a threat to us because they are so advanced. These species can have far more advanced weaponry, and technology, They may also have a more advanced way of travel, like high tech spaceships. These aliens are such a threat to us because they are capable of doing a lot more damage. With their technology being more advanced, they could take over our own forms of technology,
Humans: There are times when humans are the invaders on aliens. When this happens things get a little tricky. It's easy for humans to go out and kill the aliens, but when it's the humans who are at fault it's not that simple. In movies like Avatar, humans invade a planet that is not their own and begin to take it over. The decision then becomes what side will you take? A war will inevitably be the outcome, but the side you take can help determine the outcome. It will be a tough decision, but either following what your fellow people are doing, or doing what is best in your eyes. There is no right answer for what to do when humans are the ones attacking, the decision is ultimately up to you.