If you think you could be Person B* in a situation such as this, reassess. There's a difference between nefarious acts and misinterpreted support. These are not the same things. Do not confuse them. It's a painful thing to think you're supporting a dear friend only to find they didn't want your help and think you were trying to hurt them, then for them to reject you for exactly that.
*The original "Person B" will most likely never read this and, no, it's not my wonderful, supporting wife.
And we urge you, brothers, admonish the idle, encourage the fainthearted, help the weak, be patient with them all. 1 Thessalonians 5:14