If you read James 3:5 from the perspective of a person holding a smart phone in their hand, you can see that we have a need for wisdom regarding our words (and the Lord's deliverance!):
So also the thumb is a small member, yet it boasts of great things. How great a forest is set ablaze by such a small fire!
The wisdom of God displayed at the cross of Christ delivers us from even the restless evil that overflows out of our hearts and is announced by our tongues. We see in the book of Proverbs a store of wisdom that helps guide even our digital communication. I’ve listed a few of the words-related proverbs below - if it appears without quotation marks then I've subbed in a social media word (direct quotes are noted with “”).
When words are many, transgression is not lacking, but whoever restrains his thumbs is prudent. (10:19)
There is one whose rash words are like sword thrusts, but the thumb of the wise brings healing. (12:18)
“Anxiety in a man's heart weighs him down, but a good word makes him glad.” (12:25)
A soft answer turns away wrath, but a harsh comment stirs up anger. (15:1)
“To make an apt answer is a joy to a man, and a word in season, how good it is!” (15:23)
Better is writer’s block with quiet than a blog full of content with strife. (17:1)
“Whoever restrains his words has knowledge, and he who has a cool spirit is a man of understanding.” (17:27)
“A fool takes no pleasure in understanding, but only in expressing his opinion.” (18:2)
My inmost being will exult when your status updates speak what is right. (23:16)
A word fitly tweeted is like apples of gold in a setting of silver. (25:11)
“Let another praise you, and not your own mouth; a stranger, and not your own lips.” (27:2)
“Do you see a man who is hasty in his words? There is more hope for a fool than for him.” (29:20)
“She opens her mouth with wisdom, and the teaching of kindness is on her tongue.” (31:26, MT: King Lemuel’s mom)