Something I find to be very important when maintaining a blog such as this is to not be afraid of purging bad actors from your space.
You may feel bad because it's a niche community but don't:
You don't have to give a reason
You don't owe them anything
You have the content they want
You're the one in control
I dealt with a lot of people who completely ignored my boundaries in the beginning. Ignoring my asexuality and sending inappropriate, sexually-charged asks, one even following up along the lines of "i know it's bad so you can't be mad at me." Like, if you know it's bad then why send it to me?
It's entitlement. Straight up entitlement of, predominantly male, cardiophiles who believe that they are owed content because of how niche the kink actually is. Hilariously enough, they usually have super strict boundaries (regarding their sexuality) that they demand be respected and yet trample all over the boundaries of others'.
It wasn't until I made it painstakingly clear that I will block any and all bad actors with no second chances did they stop. The threat of being cut off from the content they want is usually enough for them to pack it in. Sucks that I have to do that but people seem to forget that I make this content for me primarily and no one is going to take away my agency in how I relieve stress.
If others enjoy the content I make, then yay! But I'm not a content farm and I'm glad to have reached a point where everyone is respectful of the boundaries I've set.
However, it is super hard and I don't blame anyone for leaving -- Be it temporary or permanently.
Do what is right for your own mental health; be it turning off DMs/anon asks, blocking people or leaving.