If you are willing to build a huge following then you would need to accept all friend request.
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No, you really do not have to accept everyone's social media requests because it is your account - you retain the rights to that account and you choose what to do with it, so definitely you aren't obliged to accept everyone's requests.
it is only people who do not do business with their social Media account that do not accept any friend requests. If you want popularity for your business or you're a content creator you need a lot of followers.I am only talking about using your Facebook account for business purposes which you need as many friends and followers as possible because they are likely going to be your potential customers.