Please don't send me any direct messages because I do not open them.
I don't reply to any direct messages that are sent to my Instagram message box.
Thank you for your support but I do not reply to any direct messages.
The first two phrases send your request strong and clear, and everyone will understand your meaning perfectly. With the third phrase, it has a personal touch where you thank your followers for supporting you and following you on Instagram but you make it clear that you don't accept any messages. They will know not to bother you anymore and would also appreciate your kind words at the beginning.
Hope this helps!
You can use the passive form to explain how messages arriving at your Instagram account will be dealt with. This is a more formal way of saying that you will not reply to any incoming messages.
If you are telling someone that you will not do something then you would say 'I won't' if you want to say you do not do something then you would say 'I don't'
so you would say 'I won't reply to direct messages' or 'I don't reply to direct messages
何かをするつもりがないことは、'I won't' で説明できます。
何かを普段からしていないことは、'I don't' で説明できます。
ですから、
'I won't reply to direct messages'（ダイレクトメッセージには返信しません）
もしくは
'I don't reply to direct messages'（ダイレクトメッセージには返信していません）
と言えます。
There is no point in sending me a direct message as I won't reply to it.
The first answer is a very direct, straight to the point way of saying you won't reply to direct messages. This is because of the 'do not' in the sentence instead of 'won't'
The second answer expands on it a little bit and explains to the reader that they are basically wasting their time (no point) as you won't reply. When there is 'no point' to something it means that it is a waste of time or has no aim.
最初の例は、ダイレクトメッセージには返答しないという意味ですが、とてもストレートな言い方です。「do not」でなく「won't」を使っていることがその理由です。
二つ目の例は、もう少し広げて、返信する気がないので時間の無駄だと伝えています。「there is no point in ～」は「～は時間の無駄、～に意味がない」という意味です。
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