Need some advice on how to best handle this situation...?

Got a friend that is a public figure and a good person. They are kind and have a large following. They are having a problem with a toxic person right now online. One that has been buying their merchandise and supporting them by donating to their charaities. .but then at the same time be s a jerk to them by sending... show more Got a friend that is a public figure and a good person. They are kind and have a large following. They are having a problem with a toxic person right now online. One that has been buying their merchandise and supporting them by donating to their charaities. .but then at the same time be s a jerk to them by sending them crappy messages and then saying they aren t going to support them anymore and stuff like that. What is the best way for them to safely remove them? Without any consquences like the jerk trying to sue them for all the money they given them and to send the merchandise back and stuff like that? This had been going on for a couple years and just need a good answer to help solve this issue if anyone has a good one without it coming back on my friend. Thank you
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