I understand the difficulty of typing on a mobile phone. But you need to make no apology for that. Notice that I also make fun of myself. You stress that we oughtn't to take the less important things too seriously. I, that we oughtn't to take ourselves too seriously when it comes to unimportant things. Perhaps that might amount to the same thing.
As for your students, I would say this: remember that they are young. If they seem to have a need to show off, to flaunt what little knowledge they have, it is because they take themselves too seriously. If they take themselves too seriously, it is because they are insecure. This is a weakness of youth, though some never grow out of it. They are afraid to admit their own failings; they do not laugh at themselves. If you would have them leave such behind, two things must be done. First, without denigrating the lesser, they must be taught the greater skills. This will give them something worthwhile to focus on and to have confidence in. Second, they must be taught not to take themselves so seriously. This is chiefly accomplished through modeling. Once they see in their elders the kind of confidence built on real knowledge and a willingness to learn rather than self-importance, they'll then have a goal to work toward. Just a thought.