You didn't get me so well, remember jurisdiction matters, if you implement KYC, you may be subjected to regulation with extra charges, payment and dues by the state you are operating from, but KYC is done by a reason of which shall be reasonable to both parties.
Meanwhile I am more agree that the mechanism adopted by Relevant is the best way to deal with a bot, why because the platform doesn't operate by amount of money you put but rather reputation.
If you read much of the reputation, you had find out it's far efficient than some of the KYC, why? Because assuming a bot post a content and all other bot joined to upvote it, even if it's million was vested of coins and 1million upvote it doesn't earn a penny for all of the participants. So the bot has no use, because it still require a work, and d coins is locked.
But I agree to 2 of your suggestions but even, having to reduce the number of airdrop coins will reduce bots of course but may also affect real users joining when they feel d incentive is too small. I agree admin should look to verifying with telegram, that may help, but they Should only accept ones with username.