This and several other abuse cases forced my previous work to use code pointers to count 'characters' for user's nickname / status messages. No one wanted to download 9MB simply browsing other users.
Oracle will fight like hell if there is a slightest chance to earn royalty from that trademark.
edit: Microsoft or other companies have no financial benefit on that fight. Even Deno itself has no financial benefit as well. This fight is for goodwill but not justifiable for financial terms (unless you can be the next owner of JavaScript trademark)